document.write( "Question 90377: Please help I am not sure how to do this type of graph\r
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\n" ); document.write( "\n" ); document.write( "Write the equation of the line with slope 4 and y-intercept (0, –5). Then graph the line.
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Algebra.Com's Answer #65587 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If you want to find the equation of line with a given a slope of \"4\" which goes through the point (\"0\",\"-5\"), you can simply use the point-slope formula to find the equation:\r
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\n" ); document.write( "\n" ); document.write( "---Point-Slope Formula---
\n" ); document.write( "\"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope, and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point\r
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\n" ); document.write( "\n" ); document.write( "So lets use the Point-Slope Formula to find the equation of the line\r
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\n" ); document.write( "\n" ); document.write( "\"y--5=%284%29%28x-0%29\" Plug in \"m=4\", \"x%5B1%5D=0\", and \"y%5B1%5D=-5\" (these values are given)\r
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\n" ); document.write( "\n" ); document.write( "\"y--5=%284%29x-%284%29%280%29%29\" Distribute \"4\"\r
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\n" ); document.write( "\n" ); document.write( "\"y--5=%284%29x%2B%28-4%29%280%29%29\" Multiply the negatives\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B5=%284%29x%2B0\" Multiply \"-4\" and \"0\" to get \"0\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%284%29x%2B0%2B-5\"Subtract \"-5\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"y=4x-5\" Combine like terms\r
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\n" ); document.write( "\n" ); document.write( "Answer:\r
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\n" ); document.write( "\n" ); document.write( "So the equation of the line with a slope of \"4\" which goes through the point (\"0\",\"-5\") is:\r
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\n" ); document.write( "\n" ); document.write( "\"y=4x-5\" which is now in \"y=mx%2Bb\" form where the slope is \"m=4\" and the y-intercept is \"b=-5\"\r
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\n" ); document.write( "\n" ); document.write( "Notice if we graph the equation \"y=4x-5\" and plot the point (\"0\",\"-5\"), we get (note: if you need help with graphing, check out this solver)\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y=4x-5\" through the point (\"0\",\"-5\")\r
\n" ); document.write( "\n" ); document.write( "and we can see that the point lies on the line. Since we know the equation has a slope of \"4\" and goes through the point (\"0\",\"-5\"), this verifies our answer.
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