Question

A line has a slope of -3 and a rise of 21, what is the run?

Answer 1

The run is -7.

Explanation:

Since we know that slope = rise/run, we can calculate the run by inputting the given numbers.

So,

-3 = 21/x and we need to solve for x.

When we cross multiply we get -3x=21.

Then, divide -3 on both sides and x = -7