Question

7) The fee for charging an electric car at Station A is $2 to start, and then $4 for each hour or fraction of an hour.
The fee for charging an electric car at Station B for x hours is modeled by the function f shown below. Which
station, A or B, costs less to charge a car for 4 hours? What is the fee for charging a car for 4 hours at that
station?
f(x) = {3x ***, 358524
0 Cheaper Station:
Fee at the chosen Station:

Answer 1

Answer:

Cheaper Station: B

Fee at Chosen Station: $15

Step-by-step explanation:

Set up equations:

Variable x = number of hours

Station A: 4x + 2

Station B: 3x + 3

Plug in 4 for x:

A:

4(4) + 2

16 + 2

$18

B:

3(4) + 3

12 + 3

$15

Compare:

$18 > $15

Station B is cheaper.