Question

11. Line n passes through points (7,12) and (4, 15). What is the slope of a line that

is perpendicular to line n?​

Answer 1

It is 1.

Explanation:

The slope of line n = rise / run

= (15 - 12) / (4 - 7)

= 3 / -3.

So the slope m = -1.

So the slope of the line perpendicular to n is -1 /m = -1 / -1 = 1.