In the inverse function what happens to the output when the functions input is multiplied by 4

For the equations below which statement is true ?

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36