The slope of the line of a distance versus time graph is the velocity of the object. If this is a constant, in other words the graph is a straight line, the object is not changing its velocity and so is not accelerating.
If the object is accelerating, the velocity of the object will be changing, thus the graph will not be a straight line, but a curve - the amount of curvature (and direction) tells you how much the object is accelerating (and in what direction - velocity and acceleration are vector quantities with both magnitude and direction).
The answer depends on whether, at the time, the object is moving towards or away from the reference point.
If moving towards the reference point (towards the time axis), the graph needs to be curved clockwise. If moving away from the reference point the graph must be curved counter-clockwise.
The object is accelerating or decelerating in the radial direction.
A straight horizontal one does.
The gradient of a distance-time graph gives the object's speed.
Object will change distance time graph when speed is changing. Distance time graph don't changed indicate of the stationary.
It is false
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.
Indirectly, yes. If the graph is a straight line there is no acceleration, if the graph is not linear there is acceleration.
curve
The curved line on a time vs. distance graph represents that the object is accelerating.
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.
the object is not moving
The object is accelerating or decelerating in the radial direction.
no motion
The object is accelerating or decelerating in the radial direction.
If its slanted up its accelerating, if down its decelerating.
A straight horizontal one does.
Straight line