Help me solve this problem please

Which of the following could be the graph of the equation y = -2x + 5

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

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?