In 2007, the United States Postal Service unveiled the first Forever Stamp. A Forever Stamp does not show a monetary value, and it may be used used to mail a one-ounce letter even if the postal rate changes in the future. The graph below shows the cost of a Forever Stamp, where C(t) is the cost in the year t. Find the following.

(a)

(b)

(c)

(d) C(2018)

Transcribed Image Text:

Cost (in cents) C(t) t 60 50 40 '08 + of 2007 '09 + '12 '13 '14 Year '16 '17 '19 +11 '18