## teller one year ago Someone mind helping me ? Find the average rate of change of f(x)=-x^2+3x+3 from x=2 to x=6

1. inkyvoyd

(f(6)-f(2))/(6-2)

2. teller

do I divide those?

3. inkyvoyd

f(6)=-15; f(2)=5

4. inkyvoyd

(-15-5)/(6-2)=(-20)/(4)=-5

5. teller

Wait what I' confused .So do I divide what you just posted?

6. inkyvoyd

no. I just worked out the problem. The answer is -5. you want to evaluate the expression $$\Huge \frac{f(b)-f(a)}{(b-a)}$$ which in this case is $$\Huge \frac{f(6)-f(2)}{(6-2)}$$

7. teller

Oh okay thank you cause I spent almost ten minutes trying to solve this and the help video was just not working for me .It was confusing me more.

8. inkyvoyd

hahaha no problem :)