Question: The figure shows a graph that compares the future values, at 9% compounded monthly, of an annuity of $50 per month and one of $60 per month.
(a) Decide which graph corresponds to which annuity.
(b) Use the graph to estimate (to the nearest 10 months) how long it will be before the larger annuity is $10,000 more than the smaller one.
