Problem
Lesson 7 Compare Functions Name: Solve the problems. 1 A hardware store charges a $\$ 30$ rental fee and $\$ 15$ per day to rent a power washer. Which equation correctly relates the total cost $y$ to rent the washer for $x$ days? A $y=15+30 x$ C $y=30-\frac{x}{15}$ B $y=30+15 x$ D $y=15-\frac{x}{30}$
Solution
Step 1 ：Find the equation that represents the total cost of renting the power washer for x days. The total cost consists of a fixed rental fee of $30 and a variable cost of $15 per day.
Step 2 ：The correct equation is \(y = 15 + 30x\).
