In Las Vegas , Nevada, stores charge a 4.6% state sales tax and a 3.65% country sales tax. Yuki is purchasing a handbag priced at 220 before tax

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.