Question

Find k if point A (1,2) , B (1/2,3) and C (0,k) are collinear​

Answer 1

Answer:

4

Step-by-step explanation:

They must have slope, if they are collinear.

 ⇒ Slope = (y₂ - y₁)/(x₂ - x₁)

For co-linearity:

⇒ Slope of AB = slope of AC

⇒ (3 - 2)/(1/2 - 1) = (k - 2)/(o - 1)

⇒ - 2 = (k - 2)/(-1)

⇒ (-2)(-1) = k - 2

⇒ 2 = k - 2

⇒ 4 = k