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S-7< 3 i need answering this problem someone asap answer

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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