Question

Question #145d8

Answer 1

Not necessarily.

Explanation:

Theorectically x can have values - `oo` to + `oo`.
`x=0` is just one value in that range. See graph below which plots the above relation. The y-axis is the velocity
graph{2x+3 [-10, 10, -5, 5]}

Remember velocity is strictly speaking directional, can be positive or negative depending on your reference point.