SOLUTION: which kind of function best models the data in each table? choose an equation to model the data. x/y -1/2.2 0/0 1/2.2 2/8.8 3/19.8 possible answers: linear y=2.2x quadrati

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: which kind of function best models the data in each table? choose an equation to model the data. x/y -1/2.2 0/0 1/2.2 2/8.8 3/19.8 possible answers: linear y=2.2x quadrati      Log On


   

Question 426296: which kind of function best models the data in each table? choose an equation to model the data.
x/y
-1/2.2
0/0
1/2.2
2/8.8
3/19.8
possible answers:
linear y=2.2x
quadratic y=2.2x^2
exponential y=2.2^x
Answer by solver91311(24713) About Me  (Show Source):
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This function is symmetric about the y-axis. -1 gets you to the same function value as 1.

No exponential equation is symmetric to the y-axis, and only a purely horizontal line would be symmetric to the y-axis. The model must be a quadratic.

Check: Square -1 to get 1 times 2.2 is 2.2

Square 0 to get 0 times 2.2 is 0

Square 1 to get 1 times 2.2 is 2.2

Square 2 to get 4 times 2.2 is 8.8

and so on.

John

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