The slope at any point is the velocity, so you can construct a graph of that. The slope at any point on that graph is the acceleration. So you can construct a graph of that. The slope at any point on that is the rate of change of acceleration. And so on.
Speed-Versus-Time Graph and Distance-Versus-Time graph are the two types of graphs that can be used to analyze the motion of an accelerating object.
Accelerating.
You would say that the object in motion is accelerating. Or you can say that the object's velocity is increasing.
The expected answer - of either a position time graph or a speed time graph - is wrong. That is because these take account of motion in the line joining the origin to the moving body but not any motion in a transverse direction.
The rate at which the speed or direction of its motion is changing.
The rate at which the speed or direction of its motion is changing.
An object that is accelerating may slow down, speed up, or change direction.
gravity
Gravity
Gravity
Because the object is not moving in any direction at all. Therefore its not accelerating or in motion.
In a constant state of motion (which may actually be stationary).