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

The run is -7.

Step-by-step 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

your answer is the last one

step-by-step explanation:

divide the length of a'c' by the length of ac to get a scale factor of two

& then reflect vertically (over the y-axis)

so your answer is dilation by a scale factor of 2 followed by reflection over the y-axis