The answer would be
130 degrees
Apparently, the calculator at the link in your lesson is fully capable of giving you the necessary numbers. My own TI-84 work-alike gives me the account balances, but the rest of the numbers need to be figured.
In 30 years, there are 12×30 = 360 months, or 4×30 = 120 quarters. See the calculator results below. Your table can be filled in using the given information to find the contribution amount. The calculator gives the final balance. The interest amount is found by subtracting the contribution amount from the final balance.

Answer:
C
Step-by-step explanation:
Rectangle base, tiny triangle sides, but rectangle top
X = -1/4
Move the 1 to the other side then divide by 4 on both sides