Question

prove that the following points are collinear:
(2) (9,6),(1,0) and(-7,-6)​

Answer 1

Step-by-step explanation:

For the points to be collinear |D|=0,

We don't have 3rd components so we will take it as 1,1,1........

| 9 6 1 |

| 1 0 1 | = 0

| -7 -6 1 |

|D|= 9(0-(-6)) -6(1-(-7))+1(-6-0)

= 54-48-6

= 0 = 0 (LHS = RHS)

So, the points are collinear.