Question

Two line are perpendicular. The slope of one line is -5/7. What is the slope of the other line? Justify your answer

Answer 1

The slope of the other line is 7/5 and it is perpendicular with a line of slope -5/7.

Explanation:

Answer 2

7/5

Explanation:

Perpendicular lines multiply to -1. Let m be the slope of the line perpendicular to the line with the slope of -5/7

-5/7 * m = -1

Multiply each side by -7/5 to get m alone

-7/5 * -5/7 *m = -1 * -7/5

m = 7/5

The slope of the line that is perpendicular to -5/7 is 7/5