18.

22.

\fFor Exercises 15-22, use [hefnllowmg graph off mml arch limit. When necessary, state that the limit docs nut exist. Taxicab fares. In New York City, taxicabs charge passengers $2.50 for entering a cab and then $0.50 for each one-fifth of a mile (or fraction thereof) traveled. (There are additional charges for slow traffic and idle times, but these are not con- sidered in this problem.) If x represents the distance traveled in miles, then C(x) is the cost of the taxi fare, where C(x) = $2.50, if x = 0, C(x) = $3.00, if 0