Question

A boat rental charges $7.50 for the first hour and $2 for each additional hour. Which rule gives the cost for x hours of renting a boat?

Answer 1

c = 7.50 + 2(x - 1) is the rule that gives cost for "x" hours of renting a boat

Solution:

Given that a boat rental charges $7.50 for the first hour and $2 for each additional hour.

To find: Rule that gives the cost for x hours of renting a boat

Let "x" be the total hours of renting a boat

$c = f + (v \times x - 1)$

"c" is the total cost for the boat rent

"f" is the fixed cost for boat rent for first hour

"v"  is the cost for each additional hours of rent

"x" is the total hours of renting a boat

In the expression we have used "x - 1" to represent the additional hour of boat rent after first hour

Here f = $ 7.50

v = $ 2

$c = 7.50 + 2 \times x - 1\\\\c = 7.50 + 2(x - 1)$

Thus c = 7.50 + 2(x - 1) is the rule that gives cost for "x" hours of renting a boat