Question

Q6. Determine of the points are
Colinear
A(1,5), B(2, 3), C (-2,-1)

Answer 1

Answer:

They are not co-linear

Step-by-step explanation:

1) First let us imagine two lines which pass through AB and BC.

2)Now form equations for the straight lines.

    For AB:

   Solutions: (1,5) and (2,3)

   Equation: 2x+y-7=0 (I found it using y=mx+c)

   Similarly for BC:

   Solutions: (2,3) & (-2,-1)

   Equation: x-y+1=0

3) Now if we compare the two lines and if they are coincidental, all three points are co-linear.

if a1/a2=b1/b2=c1/c2, then the lines are coincidental.

these are not equal hence they aren't coincidental.

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