Question

Show that the following set of points are coliiner (-5,1),(5,5),(10,7)

Answer 1

using the formula:-

1/2|x1(y2-y3)+x2(y3-y1)+x3(y1-y2)|
show that the are comes to be 0..

Answer 2

ANS:

By using the slope formula:

(Y1-y2)/(X1-x2)

m1 = (5-1)/(5+5) = 0.4

m2 = (7-1)/(10+5) = 0.4

So,

m1 =m2 so we can say that the points are collinear