Answer
See below.
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: $y-(-4)=-2(x-3)\\y+4=-2x+6\\y=-2x+2.$
See the graph below.
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