## anonymous one year ago !!

1. freckles

reaplce a with -1 and b with 2 or vice versa that is you can do either: $\frac{f(2)-f(-1)}{2-(-1)} \text{ or } \frac{f(-1)-f(2)}{-1-2}$

2. freckles

now if you want to continue you would need to know the meaning of f(x) like the graph or the expression it is assigned to

3. freckles

impossibly for me to know if that is right or wrong since you still haven't said what f was

4. freckles

ok so f(2)=? look on the x-axis and find x=2 there the find the y value that corresponds to x=2

5. freckles

where is the line at when x=2?

6. anonymous

So, X=2 and Y=0?

7. freckles

yes so f(2)=0

8. freckles

now we need to find f(-1)

9. freckles

where is the line at when x=-1?

10. anonymous

Is that Y=4?

11. freckles

yep so f(-1)=4

12. freckles

now we plug in

13. freckles

$\frac{f(2)-f(-1)}{2-(-1)}=\frac{0-4}{2-(-1)}$

14. freckles

0-4=? 2-(-1)=?

15. anonymous

-4/3 ?

16. freckles

yep sounds awesome and it doesn't matter if you did the other way: $\frac{f(-1)-f(2)}{-1-2}=\frac{4-0}{-1-2}=\frac{4}{-3}=-\frac{4}{3}$ you still get -4/3

17. anonymous

Awesome! Thanks so much for the help!

18. freckles

np