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December 22, 2014

December 22, 2014

Posted by **elizabeth** on Monday, April 20, 2009 at 4:40pm.

X= 4 5 6 7 12

Y= -2 0 2 4 ?

- math -
**Lily**, Monday, April 20, 2009 at 4:55pmWhat is the y-intercept?

- math -
**Lily**, Monday, April 20, 2009 at 4:57pmDo you need to find the ? as well?

- math -
**Reiny**, Monday, April 20, 2009 at 5:07pmPick any two points to calculate the slope as 2

(or notice that for every increase of 1 in the x, the y increases by 2, so rise/run = 2/1 )

so equation is y = 2x + b

plug in (5,0)

0 = 2(5) + b

b = -10

so

y = 2x -10

then if x=12

y = 24-10 = 14

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