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KJ4UTS

  • one year ago

Use the table below, which gives the cost (C) of n bags of fertilizer, to decide which of the following statements are true.

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  1. KJ4UTS
    • one year ago
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  2. KJ4UTS
    • one year ago
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    It looks like A. the n-values are evenly spaced. B. looks like there is a constant difference Im not exactly sure about C. and D. here.

  3. zepdrix
    • one year ago
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    Constant means unchanging. From \(\large\rm 18.75\) to \(\large\rm 25\) we saw a change of \(\large\rm 6.25\) but from \(\large\rm 25\) to \(\large\rm 29.50\) we saw a change of \(\large\rm 4.50\). Uh oh, the space between the C(n)'s isn't staying constant, right?

  4. KJ4UTS
    • one year ago
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    yeah not constant

  5. zepdrix
    • one year ago
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    So that makes B `not` true. Which automatically makes C `not` true because it's talking about a specific constant value.

  6. zepdrix
    • one year ago
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    For the function to be linear, `C(n) needs to have constant differences.` So what can you say about D?

  7. KJ4UTS
    • one year ago
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    So if there not staying constant then its not true?

  8. zepdrix
    • one year ago
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    Correct :) So D must be `not` true as well.

  9. KJ4UTS
    • one year ago
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    @zepdrix A. looks like it true?

  10. zepdrix
    • one year ago
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    Only A? Yah good job!

  11. KJ4UTS
    • one year ago
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    @zepdrix Yeah only A., now for something to be linear it has to be constant? In order to be a straight line. For this problem I think it would be C. because the average rates of change are not constant?

  12. KJ4UTS
    • one year ago
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    @zepdrix

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