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?
10
10
A. 7
ОО
B. -7
C. 1

Answer 1

C. ⅐

Explanation:

Recall: the slope of a line that is perpendicular to another is the negative reciprocal of the slope of the other line that it is perpendicular to.

Thus:

Slope of red line = -7

The green line that is perpendicular to the red line will have a slope that is the negative reciprocal of -7.

Negative reciprocal of -7 = ⅐

The slope of the green line is therefore ⅐