SOLUTION: Determine whether or not the following points are collinear. (1,9),(7,3), and (10,0)

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Question 139929: Determine whether or not the following points are collinear.
(1,9),(7,3), and (10,0)
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
To show that the points are collinear, find the slope between any two sets of points. If the slopes are the same, then they are collinear.

(1,9),(7,3), and (10,0)

Slope = %28RISE%29%2F%28RUN%29+
Slope from (1,9) to (7,3) = %283-9%29%2F%287-1%29=+%28-6%29%2F6=-1

Slope from (1,9) to (10,0)= %280-9%29%2F%2810-1%29=-9%2F9=-1

Therefore, the points are collinear.

R^2