Question

PLEASE HELP ME I BEG YOU :( !! A water park changes a rental fee plus $1.50 per hour to rent inflatable rafts. The total cost to rent a raft for 6 hours is $15. Assume the relationship is linear.Find and interpret the rate of change and the initial value

Answer 1

Answer: 
Rate of change is 1.50
Initial value is 6 
y=mx=b
15=1.50(6)+b
15=9+b
6=b(initial value)