Answer:
Rate of change=2
Explanation:
a). Consider the equation below
Rate of change=(Final value-Initial value)/change in interval,where;
Final value is when x=6 in the function 2x+1,
Replacing for x=6 in the function 2x+1=(2×6)+1=13
Initial value is when x=2 in the function 2x+1
Replacing for x=2 in the function (2×2)+1=5
The interval changed from 2 to 6=(6-2)=4
Replacing the values in equation 1
Rate of change=(13-5)/4=8/4=2