Avehicle's fuel economy is affected by its speed. the data on spaller auto's most popular vehicle is shown in the table below where x is the speed (mph) and f(x) is the fuel economy (mpg). calculate the rate of change for the interval 40 ≤ x ≤ 50.
a. 5.55 mpg/mph
b. -0.18 mpg/mph
c. -5.55 mpg/mph
d. 0.18 mpg/mph

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4