PLEASE PLEASE PLEASEE PLEASEEEEESE HELPME!?!?!? IM SO BAD AT MATH PLEASE HELP!!!


Find the average rate of change from x = 7 to x = 14 for the function f(x) = 0.01(2)x and select the correct answer below.
Select one:
a. 23.22
b. 35.84
c. 128
d. 163.84

IK THE ANSWER IS NOT D. 163.84

Respuesta :

For this case we have the following function:
 [tex]f (x) = 0.01 * (2) ^ x [/tex]
 By definition, the average rate of change is given by:
 [tex]AVR = \frac{f(x2) - f(x1)}{x2 - x1} [/tex]
 We evaluate the function for the given values:
 For x = 7:
 [tex]f (7) = 0.01 * (2) ^ 7 f (7) = 1.28[/tex]
 For x = 14:
 [tex]f (14) = 0.01 * (2) ^ {14}  f (14) = 163.84[/tex]
 Then, replacing values we have:
 [tex]AVR = \frac{163.84 - 1.28}{14 - 7} [/tex]
 [tex]AVR = 23.22[/tex]
 Answer:
 
the average rate of change from x = 7 to x = 14 is:
 
a. 23.22