How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Scott Your Own Question
Scott, MIT Graduate
Category: Math Homework
Satisfied Customers: 17710
Experience:  Over 13,000 accepts & 100% feedback in the old math category
Type Your Math Homework Question Here...
Scott is online now
A new question is answered every 9 seconds

7. Find the average rate of change of _____________________________.

This answer was rated:

7. Find the average rate of change of _____________________________. Please show all work. Here is the link to the problem that goes in the blank space.

Please post the interval to get the average rate of change for f(x) = x^2 - 4x - 5.



Customer: replied 5 years ago.

From x to x+h. Sorry I forgot to put this in.


Ok, no problem!


The formula is:



Plugging in those values:


= (f(x+h)-f(x))/h

= ((x+h)^2 - 4(x+h) - 5 - (x^2 - 4x - 5))/h


= (x^2 + 2xh + h^2 - 4x -4h - 5 - x^2 + 4x + 5)/h


Combine like terms:

= (2xh + h^2 -4h)/h


Divide through by the h:

= 2x + h - 4


Let me know if you have any questions,


Scott and other Math Homework Specialists are ready to help you