Posted by **L0vely** on Tuesday, May 14, 2013 at 12:21pm.

x: 2 | 4 | 6

y: 1 | 0 | -1

Please show me how to find the rule, thanks.

such as...

y= *equation*

- Functions - Math - 8 -
**Steve**, Tuesday, May 14, 2013 at 12:35pm
as x goes up by 2, y goes down by 1, so

y = -1/2 x + c

Now plug in a point: (2,1)

1 = -1/2 (2) + c

c = 2

so, we have

y = -1/2 x + 2

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