Question

What is the equation of a line that is perpendicular to -x + 2y =4 and passes through the point (-2, 1)

Answer 1

y = -2x - 3

Explanation:

-solve for y: y = 1/2x + 2

-perpendicular equals opposite slope: -2

-plug in the point: (1) = -2(-2) + b

1 = 4 + b

b = -3

put it all together: y = -2x - 3