Which residual value is the farthest from the line of best fit

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

There are 4 cups in a quart and 4 quarts in a ganon.jug of water? . how many cups are in a 5-gallon jug of water?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?