Social Security support
The graph shows the number of workers, W = f(t), still in the work force per Social Security beneficiary (historically and projected into the future) as a function of time t, in calendar years with 1950 ≤ t ≤ 2050. Use the graph to answer the following.
(a) What is the absolute maximum of f(t)?
(b) What is the absolute minimum of f(t)?
(c) Does this graph suggest that Social Security taxes will rise or will fall in the early 21st century? Explain.