Give an expression for f(x) using only real-valued coefficients, having degree 4, passing through the point (7,288) with roots x=8, x=3, and x=4−3i

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.