(1) Answers
point slope means y-y1=m(x-x1) where the slope is m and a point on the graph is (x1,y1) we are given slope=-3 therefor y-y1=-3(x-x1) eliminate choices A and D they gave us point (5,-7) x1=5 y1=-7 y-(-7)=-3(x-5) y+7=-3(x-5) C is answer
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