Kyler Ran 28 miles in 4 days what was Kyler's unit rate of miles to a day?

What is the y-intercept of the line given by the equation

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.

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)