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anonymous

  • one year ago

Help! Algebra!

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  1. anonymous
    • one year ago
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    The graph below shows the value of Edna's profits f(t), in dollars, after t months:

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  2. anonymous
    • one year ago
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    @amoodarya @Astrophysics @Teddyiswatshecallsme @UsukiDoll @Elsa213

  3. anonymous
    • one year ago
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    What is the closest approximate average rate of change for Edna's profits from the 18th month to the 21st month?

  4. welshfella
    • one year ago
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    that is the approximate slope of the graph for t=18 to t=21

  5. welshfella
    • one year ago
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    approximately 45 / 3 per month

  6. anonymous
    • one year ago
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    Three dollars per month Nine dollars per month 13.75 dollars per month 41.25 dollars per month So, 13.75?

  7. welshfella
    • one year ago
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    yes

  8. anonymous
    • one year ago
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    @phi what do you think?

  9. phi
    • one year ago
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    find the (x,y) points on the parabola at x=18 and x=21 then find change in y divided by change in x change is x will be 21-18 = 3

  10. anonymous
    • one year ago
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    So, it's 3?

  11. phi
    • one year ago
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    no. what is the y value at x= 18 ?

  12. welshfella
    • one year ago
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    the line is pretty thick so its not easy to read it accurately

  13. anonymous
    • one year ago
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    About 5?

  14. phi
    • one year ago
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    it looks like it is on the x-axis, so y=0 at x=18 what is the y value at x= 21 ?

  15. anonymous
    • one year ago
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    41.25

  16. phi
    • one year ago
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    so the change in y is 41.25 - 0 = 41.25 now find the slope change in y divided by change in x 41.25/3 = ?

  17. anonymous
    • one year ago
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    A number.

  18. anonymous
    • one year ago
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    LOL, JK, 13.75

  19. phi
    • one year ago
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    which is roughly what welsh explained up above the answer depends on how accurately you can read the graph.

  20. anonymous
    • one year ago
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    Well, welsh answered first, so, I'm gonna have to give the medal to him, sorry.

  21. anonymous
    • one year ago
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    Thanks!

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