Oceanside Bike Rental Shop charges 14 dollars plus 2 dollars an
hour for renting a bike. Sam paid 38 dollars to rent a bike. How
many hours did he pay to have the bike checked out?
This is a linear equation. y = mx+b y is the total cost. The slope m is the rate: that's 9 dollars per hour. x is the number of hours. b is the initial value: that's 16 dollars. y = 9x+16
The problem states that the cost was 79 dollars. Substitute that for y and solve for x. 79 = 9x+16 63 = 9x x = 7 hours
