What is the most difficult math problem in the world?

Which statements are true? see picture

Put the equation in slope intercept form by solving for y

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.