A college student wanted to rent a truck to bring some furniture up to his dorm room at college. The amount of money that the truck will cost (c) is represented by the function c = 0.85m + 19, where m is the amount of miles that the truck will be driven.

To analyze the function \( c = 0.85m + 19 \):

1. Cost per mile (variable cost): This is represented by the coefficient of \( m \) in the equation. In this case, \( 0.85 \) is the cost per mile to drive the truck.

2. Initial cost to rent the truck (fixed cost): This is represented by the constant term in the equation. Here, that value is \( 19 \).

Putting it all together:

• Cost per mile: \( 0.85 \)
• Initial cost to rent the truck: \( 19 \)

So the selections are:

• Per-mile cost: 0.85
• Initial cost to rent the truck: 19