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anonymous

  • one year ago

!!

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  1. freckles
    • one year ago
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    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
    • one year ago
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    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
    • one year ago
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    impossibly for me to know if that is right or wrong since you still haven't said what f was

  4. freckles
    • one year ago
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    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
    • one year ago
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    where is the line at when x=2?

  6. anonymous
    • one year ago
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    So, X=2 and Y=0?

  7. freckles
    • one year ago
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    yes so f(2)=0

  8. freckles
    • one year ago
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    now we need to find f(-1)

  9. freckles
    • one year ago
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    where is the line at when x=-1?

  10. anonymous
    • one year ago
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    Is that Y=4?

  11. freckles
    • one year ago
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    yep so f(-1)=4

  12. freckles
    • one year ago
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    now we plug in

  13. freckles
    • one year ago
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    \[\frac{f(2)-f(-1)}{2-(-1)}=\frac{0-4}{2-(-1)}\]

  14. freckles
    • one year ago
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    0-4=? 2-(-1)=?

  15. anonymous
    • one year ago
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    -4/3 ?

  16. freckles
    • one year ago
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    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
    • one year ago
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    Awesome! Thanks so much for the help!

  18. freckles
    • one year ago
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    np

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