A16 ounce jar of peanut butter costs $1.98. what is the price per ounce, rounded to the nearest hundredths place?

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.