Question

Write an equation of a line perpendicular to y=1/2x+3 and passing through (-1,4).

Answer 1

Since the original line has slope 1/2, a perpendicular line will have slope -2.

y - 4 = -2(x + 1)

y - 4 = -2x - 2

y = -2x + 2

2x + y = 2