Explanation
Correct answer: 20.
For the graph shown, the x-axis represents the time since the initial deposit, in months, and the y-axis represents the bank account balance, in dollars. The amount of the initial deposit is estimated by the y-coordinate of the point on the graph that represents months since the initial deposit. Therefore, the amount of the initial deposit is estimated by the corresponding y-value for the point when . When , it is estimated that . Thus, the amount of the initial deposit estimated by the graph, to the nearest whole dollar, is .
Desmos solution:
Note: The initial deposit is the y-intercept, so evaluating f(0) gives the answer.
Enter in Desmos:
Reviewed and rewritten by CookSAT