Answer:
(c) y = 2x - 1.
Step-by-step explanation:
y = -1/2(x - 18)
If the slope of a line is m then the slope of a line perpendicular is -1/m.
So the line perpendicular to this has its slope = to -1/(-1/2) = 2.
Using the point slope of a line:
y - y1 = m(x - x1) :
Here the slope m = 2 and (x1, y1) = (0, -1).
So we have:
y - (-1) = 2(x - 0)
y + 1 = 2x
y =2x - 1
