SOLUTION: Do the points (1, 2), (51, 27) and (91, 48) lie on a straight line? Give a reason for your answer.

Algebra ->  Coordinate-system -> SOLUTION: Do the points (1, 2), (51, 27) and (91, 48) lie on a straight line? Give a reason for your answer.       Log On


   

Question 1166853: Do the points (1, 2), (51, 27) and (91, 48) lie on a straight line? Give a reason for your answer.
Answer by ikleyn(52861) About Me  (Show Source):
You can put this solution on YOUR website!
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Check if the slope has identical value for two pairs of the points.

You may choose any two pair of the three possible pairs.

If the slope is the same, it is a necessary and sufficient condition for the three points to be in one line.