SOLUTION: Please help me with this question.. Why can't the first difference method be used to tell if the following data are linear? (1,3), (4,5), (5,7), (7,9)

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Question 1092939: Please help me with this question..
Why can't the first difference method be used to tell if the following data are linear? (1,3), (4,5), (5,7), (7,9)
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
Why it can not be used  ?

Who said it ?

Did you try it  ?

On the contrary,  it  CAN  be used.

Check for the slope,  using  "the first difference method"  for any pair of the points  (and for all pairs).


Good luck  ! !