The length of time in hours required for a commercial airliner to travel to a destination 1000 miles away with the wind and then 1000 miles back, against the wind, at a speed (in still air) of r miles per hour is given by 1000 1000 r+8 T-8 T(r) = = + a. Find the average rate of change in T on the interval [530, 560]. Round only your final answer to 3 decimal places. 3.57-3.77 1000 b. What are the units of the average rate of change calculations in (a)? Exercise 2. Some values of a linear function are shown in the table below. X f(x) 2 10.08 4 7 23.23 28.49 a. Find an equation for f(x). Point-slope Form = f(x)=Y+m(x-x) b. Use the function f(x) from part (a) to fill in the missing table values.