Explanation:
If P(2, 7), Q(7, 4) and R(12, 1) are collinear, then the slope of PQ is equal to the slope of QR.
The formula of a slope:
Substitute:
Answer:
if it has the same slope
the slope is
4-1=3
7-12=-5
slope=-3/5
4-7=-3
7-2=5
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