Posted by **Lauren** on Tuesday, January 22, 2013 at 9:28pm.

Write the equation of the line that passes through the points (1,6) and (-1,-2)

please help!!!!

- Math 8 - HELP! -
**Reiny**, Tuesday, January 22, 2013 at 10:00pm
slope = (-2-6)/(-1-1) = -8/-2 = 4

then

y-6 = 4(x-1) , using the point (1,6)

y-6 = 4x - 4

y = 4x + 2

test using the point which was not used, (-1,-2)

LS = y = -2

RS = 4x + 2 = 4(-1) + 2 = -2 = LS

all looks good

other forms, which can be found by just re-arranging, are

4x - y + 2 = 0

or

4x - y = -2

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