Question

let c be the function whose graph is given to the right. this graph represents the cost c of using m anytime cell - phone minutes in a month for a five - person family plan. (c) determine c(4000). interpret this value. c(4000)=510 now interpret the value of c(4000). choose the correct interpretation below. a. the value of c(4000) represents the monthly charge if 4000 minutes are used. b. the value of c(4000) represents the minutes used that correspond to a monthly charge of $4000. c. the value of c(4000) represents the monthly charge if each person on the plan uses 4000 minutes. the value of c(1000) represents the monthly charge if 1000 minutes are used. d. the value of c(1000) represents the number of minutes included in the base plan.

Explanation:

Step1: Understand function notation

The function $C(m)$ represents the cost $C$ as a function of the number of minutes $m$ used. When we see $C(4000)$, it means we are finding the cost when $m = 4000$ minutes are used.

Step2: Interpret the result

Since $C(4000)=510$, it means that the monthly charge when 4000 minutes are used is $510$.

Answer:

A. The value of $C(4000)$ represents the monthly charge if 4000 minutes are used.