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Line m has the equation y = 3x + 5. Line n has the equation y = kx - 7. Lines m and n intersect at the point (-4, -7). What is the value of k?

 Jul 17, 2020
 #1
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If y=3x+5 intersects y=kx-7, then -4 and -7 must satisfy both equations. For y=kx-7:

 

y=kx-7

-7=k(-4)-7

-7=-4k-7

-4k=0

k=0

 Jul 17, 2020

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