Posted by Lilly on Thursday, May 7, 2009 at 5:01pm.
write an equation in slopeintercept formfor the line passing through each pair of points.
(12,5) and (4,1)
pleae help me!!!! i don't understanf how to solve it

math  Reiny, Thursday, May 7, 2009 at 6:30pm
first find the slope
slope =(51)/(12+4) = 4/16 = 1/4
so y = (1/4)x + b
but (4,1) lies on it
so 1 = (1/4)(4) + b
1 = 1+b
b = 2
equation: y = (1/4)x + 2
I usually check if the other point satisfies,
LS = 5
RS + (1/4)(12 + 2
= 3+2 = 5 = LS
my equation is correct
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