Learning Goal: I’m working on a calculus question and need an explanation to help me learn.Rate of Change WITHOUT derivativesPROBLEM: Given f(x)=.04(8x-x2) Find the rate of change of elevation whenx = 2 WITHOUT taking a derivatives directly. Instead use find the slope between The first student should let x = 1 using discussion title Delta x=1. Then use f(2+1) and f(2-1) to find the slope between two points (1, f(1)) and (3, f(3)). The first line of their post should be The second student should select a different value x < 1 and find the appropriate f(x+x ) and f(x-x ) to find the slope between two DIFFERENT POINTS closer to the x=2 value. Also include in your title the value of your x!The third student should select and POST their new x < the second student's value. Again find the new appropriate f(x+x ) and f(x-x ) to find the slope between two DIFFERENT POINTS even closer to the x=2 value.Etc. Requirements: 250 words