Question bank / Linear functions

Math · AlgebraEasy

The function C(t)=12+4.5tC(t) = 12 + 4.5t gives the total cost, in dollars, of renting a kayak for tt hours. What is the best interpretation of 1212 in this context?

A

The cost per hour of renting the kayak

B

The maximum number of hours the kayak can be rented

C

The total cost of renting the kayak for 1 hour

D

A fixed cost charged regardless of the number of hours

Show answer and explanation

Answer: D

When t=0t = 0, C(0)=12C(0) = 12, so 12 is the part of the cost that does not depend on the number of hours. It is a fixed fee. The per-hour cost is 4.54.5.

Choice A describes 4.54.5, the coefficient of tt, not the constant 12.

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