Can someone help me pls pls

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What term makes it inconsistent y=2x - 4

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.