Majed made 208$ for 13 hours of work. At the same rate, how much would he make for 7 hours of work

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.