Final answer:
The equation in slope-intercept form for the cost of renting a bike is y = 2x + 5, with x being hours rented and y being total cost. The cost for 3 hours of bike rental is $11.
Step-by-step explanation:
The equation to model the cost of renting a bike, where x is the number of hours a bike is rented and y is the total cost, is y = 2x + 5. This is in slope-intercept form, with the slope representing the cost per hour ($2) and the y-intercept representing the initial deposit ($5).
To calculate the cost to rent a bike for 3 hours, we plug in x = 3 into the equation:
y = 2(3) + 5
y = 6 + 5
y = 11
Therefore, it costs $11 to rent a bike for 3 hours.