Determine whether the given points are collinear.
`P(1, 2) , Q(2, 8/5), R(3, 6/5)`

Explanation

Dimensional formula for T = T
Dimensional formula for r = L
Dimensional formula for `G = M^(-1) L^3 T^(-2)`
Dimensional formula for M = M.
(a) `T^2M^)L^) = [L^3] [ML^(-3) T^2]`
`T^2 M^0L^0 = L^0 MT^2` - not correct
(b) ` T^2 = [L^3] [ML^(-3) T^2] [M^(-1) ]`
`T^2 = T^2` = dimensionally correct