Show that the points (5, 1), (1, -1) and (11,4 lie on a straight line.
hey royals please answer fast
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Step-by-step explanation:
∆= 1/2|x1(y2-y3) +x2(y3-y1)+ x3(y1-y2)|
= 1/2| 5(1-4)+1(4-1)+11(1--1)|
= 1/2 |5×(-3)+1×3+11×2|
=1/2 |-15+3+12|
=1/2 × 0
=0
∆=0
three points are collinear.
they lie on a straight line.
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