A state park charges $5 per car plus $1 per person as an admission fee. The total charged for a car with x people is f(x) = x + 5. How will the graph of this function change if the per car charge is changed to $8 per car?

The line will shift vertically down by $3.
The line will shift vertically up by $3.
The line will shift vertically up by $8.
The line will shift vertically down by $8.

Question

A state park charges $5 per car plus $1 per person as an admission fee. The total charged for a car with x people is f(x) = x + 5. How will the graph of this function change if the per car charge is changed to $8 per car?

The line will shift vertically down by $3.
 The line will shift vertically up by $3.
 The line will shift vertically up by $8.
 The line will shift vertically down by $8.

Vocaloid · Answer

notice how the old charge is $5 per car

this is represented in the equation f(x) = x + 5 as the + 5 part

if the car charge is changed to $8 per car, the function changes to f(x) = x + 8. compared to x + 5, how much greater is x + 8?