document.write( "Question 623677: Dear All,\r
\n" ); document.write( "\n" ); document.write( "I wish if you could help me understand below, please?\r
\n" ); document.write( "\n" ); document.write( "The problem says: Line X has a slope of 3. The line passes through Point X at (-2,-1) and also passes through Point Z., which has an x-coordinate of 0. What are the coordinates of Point Z?\r
\n" ); document.write( "\n" ); document.write( "So I guess that I have to substitute the given values in the formula m=Y2-y1 / X2-X1 (sorry I could not find the small 2s and 1s in my keyboard). So I got: 3= -1-y/-2-0 then 3= -1-y / -2 and after that I am stuck. I do not know how to find the Y value.\r
\n" ); document.write( "\n" ); document.write( "Many thanks for your help.
\n" ); document.write( "Ilda \n" ); document.write( "

Algebra.Com's Answer #392219 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
Line X has a slope of 3. The line passes through Point X at (-2,-1) and also passes through Point Z., which has an x-coordinate of 0. What are the coordinates of Point Z?
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\n" ); document.write( "Step 1: Use the point and y = mx + b to find b, the y-intercept
\n" ); document.write( "-1 = 3*(-2) + b
\n" ); document.write( "b = 5
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\n" ); document.write( "That makes the eqn of the line thru the point
\n" ); document.write( "y = 3x + 5
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\n" ); document.write( "Sub 0 for x
\n" ); document.write( "--> y = 5
\n" ); document.write( "Point Z is (0,5)\r
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