Answer:
The answer to your question is: y = -2x + 10
Explanation:
Data
Perpendicular to y = (1/2)x + 5
Point = (1, 8)
Formula
(y - y1) = m(x - x1)
Normal Slope = 1/2
New slope because they are perpendicular = -2
Substitution
( y - 8) = -2(x - 1)
y = -2x + 2 + 8
y = -2x + 10