Test the following combinations and explain why each does not have the properties needed to describe the concept of velocity: Δ d + Δ t, Δ d − Δ t Δ d × Δ t, Δ t / Δ d.
Δ t + Δ d will increase when either constant increase. The sign of Δ d − Δ t will depend on how big Δ d and Δ t is. Δ t × Δ d will increase when either constant increases. Δ t Δ d decreases when there is an increasing displacement. It will also increase when there is an increase in the time period.
velocity velocity is even by changing displacement over change in time. And none of this formless appear that way. So none of those just rag velocity.