Question

Which of the following equations is perpendicular to y = -2x + 1?

A:y = -2x + -18
B:y = -1/2 x + -18
C:y = -x + 1
D:y = 1/2x + -1

Answer 1

D.

Answer 2

Product of slopes = -1; hence d

Answer 3

y = mx + c is the general equation of the line where m is slope
for two lines to be perpendicular (m1 and m2 being the slopes) m1 * m2 = -1 is required condition