Question

Jamie has a phone plan that can be modeled by the function y = 0.152x + 12, where y is the cost in a given month and x is the number of minutes used to call long-distance. How much will it cost Jamie if she has 144 minutes in long-distance calling?

A. $34.28
B. $12.22
C. $35.88
D. $24.08

Answer 1

To find the cost of Jamie's 144 minutes of long-distance calling, plug in 144 for x in the function y = 0.152x + 12. The result is approximately $33.89, with the closest answer choice being A. $34.28.

Step-by-step explanation:

The question asks how much it will cost Jamie if she uses 144 minutes of long-distance calling with a phone plan modeled by the function y = 0.152x + 12. To answer this, we need to substitute the number of minutes (x = 144) into the function and calculate the cost (y).

Let's calculate:

y = 0.152(144) + 12
y = 21.888 + 12
y = $33.888

After rounding to the nearest cent, the cost for Jamie's 144 minutes of long-distance calling would be approximately $33.89. Thus, the closest answer from the options provided is A. $34.28.