If f(x) is the black function, and g(x) the blue function graphed above, then
a) What is the average rate of change of f(x) over the interval $1.8 \leq x \leq 6.8 \ $ ?

b) What is the average rate of change of g(x) over the interval $1.8 \leq x \leq 6.8 \ $ ?