Question

Show that the points (1, 1), (3, 0) and (-1, 2) are collinear.​

Answer 1

Answer:

use distance formula

let (1,1) be A, (3,0) be B, (-1,2) be C

distance of AB distance ofBC and distance of CA are same then lines are colinear

Step-by-step explanation:

√[(x2-x1)^2+(y2-y1)^2]

Answer 2

Answer:

x¹ y¹ = 1 , 1

x² y² = 3 , 0

x³ y³ = -1 , 2

x¹+x²+x³= 1+3+(-1)= 3

y¹+y²+y³ = 1+0+2 = 3

hence (1,1) , (3,0) and (-1,2) are collinear

hope this helps you ☺️