Suppose a college student pays $500 for tuition fees. however, she also has to pay $250 for her textbooks ( what percent of her total education costs does she pay for her books?

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.