algebra

does the data in the table represent a linear function? if so, wirte a rule for the function.

(below is what the table looks like)
x | -2| -1| 0 | 1| 2|
y | -7| 1| 8 | 17| 25|

answer choices
yes; y = 8x +9
yes; y = 8x + 8
no
yes; y = 1/8x + 8

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asked by Emma
  1. what is (25-17)/(2-1) ?
    8

    what is
    (1 - -7) /( -1 - -2) ?
    8/1 = 8

    humm looks like slope = 8 so far

    but what about
    (17 -8)/ (1 - 0) = 9 !!!!!
    oh my, not the same slope
    crash
    not on a straight line of constant slope

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    posted by Damon
  2. please help!!!!!!!!!!!

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    posted by Emma
  3. Please have patience, child.

  4. I did. It is not a straight line.
    answer is no

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    posted by Damon
  5. so the answer is no??

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    posted by Emma
  6. Sorry I didn't see that he answered. thank u

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    posted by Emma
  7. It is almost a linear function, if the 8 becomes a 9, i.e. the y-values become
    -7,1,9,17,25.

    Otherwise the answer is no.

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    posted by MathMate
  8. You are welcome.

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    posted by Damon

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