Question

find the value of K for which the points are collinear (7,-2) (5,1) (3,K)

Answer 1

here is ur answer hope you like it

Answer 2

$(1 - ( - 2)) \div (5 - 7) = (k - 1) \div (3 - 5)$
$- 3 \div 2 = (k - 1) \div ( - 2)$
$3 = (k - 1) \\ k = 4$