Question

Verify that the points (1,5) (2,3)& (-2,-1)
Are collinear

Answer 1

Answer: NO

Step-by-step explanation:

for points to be co linear

$\frac{1}{2} ( x_{1} (y_{2} - y_{3} ) + x_{2} ( y_{3}  - y_{1} ) + x_{3} (y_{1} - y_{2} ) ) = 0$

but in this case

$\frac{1}{2} (1) [ 3 - (-1) ] + (2)[ (-1) - 5 ] +(-2) [ 5 - 3 ] \neq 0$

weather it is equal to

- 6