Answer:
The correct option is 4.
Step-by-step 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
[tex]Amount=\$0-\$75=-\$75[/tex]
Down arrow from $0 to -$75 represents spending of $75.
After that Mandy earned $75. So, the new amount is
[tex]Amount=-\$75+\$75=\$0[/tex]
Upward arrow from -$75 to $0 represents earning of $75.
Therefore the correct option is 4.
