Question

The lines shown below are perpendicular. If the green line has a slope of -1/4, what is the slope of the red line

Answer 1

The correct answer is 4.

Explanation:

I just got it correct.

Answer 2

4

Explanation:

You can read the slope of the red line from the graph. It has a rise of 4 for a run of 1, so has slope 4/1 = 4.

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You also know that the slope of a perpendicular line will be the negative reciprocal of the slope of the given line:

-1/(-1/4) = 4

The slope of the red line is 4.