An Elevator
The answer to the riddle is a road or a street. Roads have lanes that go side to side for vehicles and are often marked with lines that go up and down, such as arrows or other directional indicators. However, the road itself remains stationary and does not move.
The point that moves (if none a new point is made) goes up or down the graph. Up is a positive number. Down is a negative number.
your age, your height , and possibly your weight
Oxygen :)
Your hand...
The temperature It could also be a piano scale or a staircase.
Anything that moves can the real answer to the riddle is carpet
A stock market, it goes up and down but never move
Stairs, you go up you go down but the stairs never move.
TV channels
roads?
an elevator
The temperature It could also be a piano scale or a staircase.
A slinky goes down the stairs by the force of gravity pulling it downwards. As one end of the slinky begins to descend, this creates a wave-like motion that propels the rest of the slinky down the stairs in a cascading fashion. The tension in the coils helps to maintain its structure as it moves.
A rug
steps
stairs