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anonymous

  • one year ago

help please The table shows the outputs y for different inputs x: Input (x) 5 6 7 8 Output (y) 2 5 8 11 Part A: Do the data in this table represent a function? Justify your answer. Part B: Compare the data in the table with the relation f(x) = 2x + 13. Which relation has a greater value when x = 7? Part C: Using the relation in Part B, what is the value of x if f(x) = 75?

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  1. UnkleRhaukus
    • one year ago
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    if each x, maps to only one y value, it can be a function

  2. UnkleRhaukus
    • one year ago
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    eg Input (x) 1 1 2 3 Output (y) 2 5 8 11 is not a function, because x = 1, gives two y values: 2 and 5

  3. UnkleRhaukus
    • one year ago
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    @Mr.kole does your table, have and x input, giving multiple y values?

  4. anonymous
    • one year ago
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    yh

  5. UnkleRhaukus
    • one year ago
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    pardon?

  6. UnkleRhaukus
    • one year ago
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    does any x input, give multiple y values?

  7. anonymous
    • one year ago
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    no

  8. UnkleRhaukus
    • one year ago
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    so can it be a function ?

  9. anonymous
    • one year ago
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    yh

  10. UnkleRhaukus
    • one year ago
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    yes.

  11. UnkleRhaukus
    • one year ago
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    now B What is the value in the table, that relates to x = 7

  12. anonymous
    • one year ago
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    hey i not reall good with algebra so please have mercy

  13. anonymous
    • one year ago
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    really

  14. UnkleRhaukus
    • one year ago
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    nope, what is y, when x is 7 use the table

  15. anonymous
    • one year ago
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    8

  16. UnkleRhaukus
    • one year ago
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    x=7 Input | (x) 5 6 7 8 Output | (y) 2 5 8 11 | y=8 yes!

  17. UnkleRhaukus
    • one year ago
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    now what is f(x) = 2x + 13. when x = 7 ie f(7) = 2(7) + 13. = =

  18. UnkleRhaukus
    • one year ago
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    2 times 7 plus 13 equals ?

  19. anonymous
    • one year ago
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    noooo

  20. UnkleRhaukus
    • one year ago
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    f(7) = 2(7) + 13. = 14 +13 =

  21. anonymous
    • one year ago
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    27

  22. UnkleRhaukus
    • one year ago
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    So Which relation has a greater value when x = 7?

  23. anonymous
    • one year ago
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    y

  24. UnkleRhaukus
    • one year ago
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    when x= 7: y = 8 and f = 27 which is greater

  25. anonymous
    • one year ago
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    f

  26. UnkleRhaukus
    • one year ago
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    it's f

  27. UnkleRhaukus
    • one year ago
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    right?

  28. UnkleRhaukus
    • one year ago
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    now for C

  29. UnkleRhaukus
    • one year ago
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    it asks, for which x, is f(x) = 2x + 13 = 75

  30. UnkleRhaukus
    • one year ago
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    so solve 2x+13 = 75 for x

  31. anonymous
    • one year ago
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    yh

  32. anonymous
    • one year ago
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    31

  33. UnkleRhaukus
    • one year ago
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    done!

  34. anonymous
    • one year ago
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    thanks

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