8x-y=-25 rate of change

Which expressions are equivalent to -6 + 3m

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

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12