Question

Choose the equation of the line passing through the point (-2, 4) and perpendicular to y = -1/2x + 4.

y = 2x + 8

y = 2x

y = -2x - 8

y = -2x

Answer 1

Anything perpendicular to y = -1/2x+4 has a slope of 2 (flip the fraction and change the sign of -1/2 to get 2)


y = mx+b

y = 2x+b

4 = 2(-2)+b

4 = - 4+b

4+4 = b

8 = b

b = 8


So the answer is y = 2x+8