Posted by **Daniella** on Sunday, February 20, 2011 at 7:51pm.

Three points are on a coordinate plane: A(1, 5), B(-2, -4), and C(6, -4).

1.

Write an equation in point-slope form of the line with slope -1 that contains point C.

2.

Write an equation in point-slope form of the line that contains points A an B.

3.

Write an equation of the line that contains B and C.

- Geometry -
**Henry**, Monday, February 21, 2011 at 10:29pm
1. C(6,-4), m = -1. (X,Y).

m = y-(-4)/(X-6) = -1,

Eq: Y+4 = -1(X-6).

2. A(1,5), B(-2,-4),

m = (-4-5)/(-2-2) = -9/-4 = 9/4.

A(1,5), X,Y),

m = (Y-5/(X-1) = (9/4)/1,

Cross multiply:

Eq: Y-5 = 9/4(X-1).

3. Similar to 1 and 2.

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