Work Step by Step
We know that if the slope of a line is $m$ and it contains $P_1(x_1,y_1)$, then its equation is: $y-y_1=m(x-x_1).$ Hence here: $y-5=-3(x-(-2))\\y-5=-3(x+2)\\y-5=-3x-6\\y=-3x-1.$
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