Posted by **joshua** on Wednesday, January 5, 2011 at 8:45pm.

Write an equation in slope intercept form of the line that passes through (4, 1) and (5, -1).

- Algebra -
**Olivia**, Wednesday, January 5, 2011 at 8:47pm
y-y1=m(x-x1)

-1-1=m(5-4)

M=-2

- Algebra -
**Reiny**, Wednesday, January 5, 2011 at 10:54pm
Olivia found the slope

so y = -2x + b

sub in one of the given points, I will use (4,1)

1 = -2(4) + b

b = 9

y = -2x + 9

(test it with the other point, it works)

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