Would you believe DISTANCE and TIME (both from some fixed point).
Since it is called a distance time graph I don't think it is too wild a guess to suggest that they might be "distance" and "time"!
the relationship between two variables
distance time graph is a graph traveled in a graph which shows how much we have traveled in equal period of time.
x (usually for time) y (usually for distance) and sometimes z
distance-time graph
The slope of a distance-time graph represents speed.
The slope of a graph represents the rate of change between two variables. In a linear relationship, it indicates how much one variable changes for a unit change in another variable. For example, in a distance-time graph, the slope represents speed, showing how distance changes over time. The steepness of the slope can indicate the strength of the relationship between the variables.
Typically distance is plotted on the y-axis of a distance-time graph.
If the motion of the object in in n-dimensional space, then an n+1 dimensional graph, in which one axis shows the time and the remaining n dimensions are the coordinates of the object at that point in time. The wrong answer is a distance-time graph, since that does not show any radial motion. An object going round in a circle around the origin is at a constant distance and so a distance-time graph would show no motion which is certainly not true.
speed is the gradient under the distance vs time graph which is change in distance /change in time
No. The slope of the distance-time graph is the change in distance per unit of time - otherwise known as speed. Acceleration is the slope of the speed time graph.
No. A time graph is a special type of line graph. A line graph can represent any two variables such as height and weight of a group of people. Nothing to do with time.