Given the functions f(x) and g(x) as shown below, which has a greater average rate of change over the interval [-1,1]?

A:f(x) is greater by 0.75
B:f(x) is greater by 0.5
C:g(x) is greater by 0.75
D:f(x) is greater by 0.5

Answer this question only if you know the answer! 30 points and

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Is this a polynomial function? i need to know asap