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January 31, 2015

January 31, 2015

Posted by **Melina** on Friday, November 26, 2010 at 7:18pm.

Chart;

Input Output;

-5 (negative) 22 (positive)

-2 (negative) 10 (positive)

1 (positive) -2 (negative)

4 (positive) -14 (negative)

7 (positive) -26 (negative)

- Beginners Algebra -
**Damon**, Friday, November 26, 2010 at 7:26pmI am going to guess it looks like a straight line.

y = m x + b

to find the slope m

m = (Y2-Y1)/(X2-X1) for any to points if it really is a line.

take the last two points

m = (-26 + 14) / (7-4) = -12/3 = -4

put in a point to get b

y = -4x + b

22 = -4(-5) + b

b = 2

so if it is a straight line then

y = -4x + 2

check that in the other points to make sure they all lie on the line

then for x = 0

y = 2

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