SOLUTION: Determine the value(s) of t if P(-3;7), Q(5;-9) and R (-2;t ) are co-linear.

Question 755311: Determine the value(s) of t if P(-3;7), Q(5;-9) and R (-2;t ) are co-linear.
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
collinear lines have the same slope so...

which gives us t=5

graphing is actually much easier, but relies on precision and accuracy
:)
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