Posted by **Amy** on Monday, October 11, 2010 at 12:35am.

x = 2 , 4 , 6 , 8

y = 18, 34, 50, 66

This is supposed to be a table where the x lines up with the y in order

How would I find the equation to solve this when x = 20?

x goes up by +2

y goes up by +16 but starts with 18

- MATH PLEASE HELP -
**drwls**, Monday, October 11, 2010 at 1:54am
The relationship is

y = 2 + 8 x

if x = 18, y = 146

- MATH PLEASE HELP -
**Amy**, Monday, October 11, 2010 at 9:00am
Also, how did you come up with the equation?

Where did the 8 and 2 come from?

- MATH PLEASE HELP -
**Amy**, Monday, October 11, 2010 at 9:29am
I understand now

- MATH PLEASE HELP -
**drwls**, Monday, October 11, 2010 at 9:34am
Good.

8 was the obvious slope.

I picked the constant term 2 so that any one of the (x,y) combinations would match.

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