please help!

Since it's perpendicular, the slop would be the negative reciprocal of -2, which would be 1/2.

It intersects the point (8,2) which means that 2=1/2(8)+b.

2=1/2(8)+b

2=4+b

b=-2

So, the new equation is $\boxed{y=\dfrac{1}{2}x-2}$