Question

If the two lines below are perpendicular and the slope of the red line is -7,

what is the slope of the green line?

Answer 1

1/7

Explanation:

Formula for 2 perpendicular lines: m1 * m2 = -1,

where m1 is gradient of 1st line and m2 is gradient of 2nd line

Application:

-7 * m2 = -1

m2 = 1/7