A recipe call for3/4cups of sugar and 1/2 cup of brown sugar you are reducing the recipe. you will use 1/6 cup of brown sugar how muchsugar will you use

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.