Posted by **raquel** on Monday, January 14, 2013 at 7:19pm.

what is the rule if the input is 1 and output is 9 and input is 2 and output is 12 and the input is 3 and output 16

- math,geometry -
**Reiny**, Monday, January 14, 2013 at 9:26pm
1 ---> 9

2 ---> 12

3 ---> 16

hard to tell, it is not linear,

I don't know what level this is,

let's assume it is a quadratic

I did some quick calculations and got

y = (1/2)x^2 + (3/2)x + 7

or

y = (x^2 + 3x + 14)/2

works for your 3 values

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