What is the answer for this question? on the screenshot

How do i do this activity, is appreciated

What term makes it inconsistent y=2x - 4 ?

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons