document.write( "Question 150596: y=x^2+2x-15 find the corresponding y values for x=-4,-3,-2,-1,0,1,2 y=4x^2 +2x-15 y=18x-15 y=18x-15 then moved the 18 xon the other side to move the x to the other side y=15-18x the answer is -3 is this right. Then how do i find the corresponding for the # that is at the top. \n" ); document.write( "

Algebra.Com's Answer #110563 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
Table of Contents:\r
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\n" ); document.write( "\n" ); document.write( "Jump to Table\r
\n" ); document.write( "\n" ); document.write( "Jump to Graph\r
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\n" ); document.write( "\n" ); document.write( "In order to graph $\"y=x%5E2%2B2x-15\"$ , we need to plot some points.\r
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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=-4\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%28-4%29%5E2%2B2%28-4%29-15\"$ Plug in $\"x=-4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%2816%29%2B2%28-4%29-15\"$ Square $\"-4\"$ to get $\"16\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=16%2B2%28-4%29-15\"$ Multiply $\"1\"$ and $\"16\"$ to get $\"16\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=16-8-15\"$ Multiply $\"2\"$ and $\"-4\"$ to get $\"-8\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-7\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=-4\"$ , then $\"y=-7\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=-3\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%28-3%29%5E2%2B2%28-3%29-15\"$ Plug in $\"x=-3\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%289%29%2B2%28-3%29-15\"$ Square $\"-3\"$ to get $\"9\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=9%2B2%28-3%29-15\"$ Multiply $\"1\"$ and $\"9\"$ to get $\"9\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=9-6-15\"$ Multiply $\"2\"$ and $\"-3\"$ to get $\"-6\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-12\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=-3\"$ , then $\"y=-12\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

.\r
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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=-2\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%28-2%29%5E2%2B2%28-2%29-15\"$ Plug in $\"x=-2\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%284%29%2B2%28-2%29-15\"$ Square $\"-2\"$ to get $\"4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=4%2B2%28-2%29-15\"$ Multiply $\"1\"$ and $\"4\"$ to get $\"4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=4-4-15\"$ Multiply $\"2\"$ and $\"-2\"$ to get $\"-4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-15\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=-2\"$ , then $\"y=-15\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

.\r
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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=-1\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%28-1%29%5E2%2B2%28-1%29-15\"$ Plug in $\"x=-1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%281%29%2B2%28-1%29-15\"$ Square $\"-1\"$ to get $\"1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%2B2%28-1%29-15\"$ Multiply $\"1\"$ and $\"1\"$ to get $\"1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1-2-15\"$ Multiply $\"2\"$ and $\"-1\"$ to get $\"-2\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-16\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=-1\"$ , then $\"y=-16\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=0\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%280%29%5E2%2B2%280%29-15\"$ Plug in $\"x=0\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%280%29%2B2%280%29-15\"$ Square $\"0\"$ to get $\"0\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=0%2B2%280%29-15\"$ Multiply $\"1\"$ and $\"0\"$ to get $\"0\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=0%2B0-15\"$ Multiply $\"2\"$ and $\"0\"$ to get $\"0\"$ .\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"y=-15\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=0\"$ , then $\"y=-15\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

.\r
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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=1\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%281%29%5E2%2B2%281%29-15\"$ Plug in $\"x=1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%281%29%2B2%281%29-15\"$ Square $\"1\"$ to get $\"1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%2B2%281%29-15\"$ Multiply $\"1\"$ and $\"1\"$ to get $\"1\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%2B2-15\"$ Multiply $\"2\"$ and $\"1\"$ to get $\"2\"$ .\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"y=-12\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=1\"$ , then $\"y=-12\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

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\n" ); document.write( "\n" ); document.write( "Let's find y when $\"x=2\"$ :\r
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\n" ); document.write( "\n" ); document.write( " $\"y=x%5E2%2B2x-15\"$ Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( " $\"y=%282%29%5E2%2B2%282%29-15\"$ Plug in $\"x=2\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=1%284%29%2B2%282%29-15\"$ Square $\"2\"$ to get $\"4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=4%2B2%282%29-15\"$ Multiply $\"1\"$ and $\"4\"$ to get $\"4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=4%2B4-15\"$ Multiply $\"2\"$ and $\"2\"$ to get $\"4\"$ .\r
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\n" ); document.write( "\n" ); document.write( " $\"y=-7\"$ Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So when $\"x=2\"$ , then $\"y=-7\"$ .\r
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\n" ); document.write( "\n" ); document.write( "So we have the point

Table of Values:

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document.write( "x y
-4 -7
-3 -12
-2 -15
-1 -16
0 -15
1 -12
2 -7\r\n" );
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Graph:

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\n" ); document.write( "\n" ); document.write( "Now draw a curve through all of the points to graph $\"y=x%5E2%2B2x-15\"$ :\r
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Graph of $\"y=x%5E2%2B2x-15\"$ \n" ); document.write( "

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