Answer
y=-2x-1
Work Step by Step
Given: y=$\frac{1}{2}$x-1 ,(-2,3)
Since its perpendicular, the slope will be the reciprocal of the other equation's slope ($\frac{1}{2}$) which is -2.So y=-2x+b
Using the points given, plug into the equation:
y=-2x+b
3=-2(-2)+b
3=4+b
b=-1
So the equation would be y=-2x-1
