Question

You are considering a certain telephone company. They charge S0.18 per minute of talking, plus a fixed base monthly fee of S70.If M represents the number of minutes you talk in a month, and C is the total monthly charge, which of these is the correct relationship between M and C? Select the correct answer below

a) C = 0.18M + 70
b) M = 0.70C + 18
c) C = 0.70M + 18
d) M = 0.18C + 70

Answer 1

a) C = 0.18M + 70

Explanation:

Charges:

• 1. Monthly fee = S70
• 2. Charge for talking = S0.18 per minute

Totals, considering number of minutes:

• S70 + S0.18*M

So the equation would be:

• C = 0.18M + 70

This is the option a)