There are many things the graph does not show. It does not show my shoe size, for example.
a vertical one
if the speed is zero then the distance versus time line will be horizontal
the slope show the velocity of the object which show its direction and magnitude.
The slope of the line would decrease.
It usually shows the distance of an object from a fixed point over a time period. The distance is usually measured in one specific direction so that radial motion is ignored.
a vertical one
It is false
Yes it is.
if the speed is zero then the distance versus time line will be horizontal
the slope show the velocity of the object which show its direction and magnitude.
The slope of the line would decrease.
If the line formed by the graph is straight, the speed is constant. A horizontal line would show the object as stationary.
If it is distance from a point versus time, with distance on the vertical axis and time on the horizontal axis, it would show a steep vertical climb on the graph. The steeper vertical change, the faster, but never completely vertical. Large "rise" (distance) over short "run" (time). With 0 acceleration, the graph is a straight line.
It usually shows the distance of an object from a fixed point over a time period. The distance is usually measured in one specific direction so that radial motion is ignored.
it will never be a vertical line as the slope is velocity and that would be infinite speed
Distance and Time are variables and always moving. Therefore the answer is no. Let's suppose: If time is the vertical axis and distance (travelled) the horizontal axis. Standing still (not travelling) would show a vertical graph line. If distance is the vertical axis and time the horizontal axis. Then standing still would form a horizontal line based on time alone.
It is a measure of speed of the object, but only in the radial direction: that is, towards or away from the point from which distance is measured. The object could be going around that point in circular motion and the graph would show absolutely nothing.