Question

Choose a number line to model the following situation:

Mandy spent $75 and then earned $75.

Answer 1

I believe it is D because it is the one that shows you are back where you started

Answer 2

The correct option is 4.

Explanation:

Let the initial amount be 0.

It is given that Mandy spent $75 and then earned $75.

The given number line, represents earning above zero and spending below zero.

If Mandy spent $75, the the new amount is

`Amount=\$0-\$75=-\$75`

Down arrow from $0 to -$75 represents spending of $75.

After that Mandy earned $75. So, the new amount is

`Amount=-\$75+\$75=\$0`

Upward arrow from -$75 to $0 represents earning of $75.

Therefore the correct option is 4.