Answer:
The answer is no because for 1 hour he gets 20 dollars and for 2 hours he gets 30$ (which is less for working 2 hours). So, if you multiply 2 hours with 20 dollars, you should get 40, not 30. So therefore, it is not proportional. And same for 3 hours: multiply 3 with 20 to get 60, not 50.
In the default window of a graphing calculator, there is only one intersection that you see.
However, if you zoom out, you will see that they are 3 intersections to the pair of equations.
Given:
Beginning Balance: 2,447.67
Less: Withdrawal <u> 231.49</u>
Total 2,216.18
Add: Credit to acct <u> 36.61</u>
Ending Balance <u> 2,252.79
</u>The new balance is $2,252.79<u>
</u>
<span>She needs to save an additional 108 quarters.</span>
