I would like to state first that you misspelled horizontal. The answer to your question is Constant speed.
On a speed/time graph, a horizontical line means that the speed is constant.
Constant speed..
When there is a curved line going upwards on a graph it means the distance is increasing
y axis
It usually means that the line ends there but does not include that point.
It means, that the numbers of the data about to be put on starts somewhere usually higher than 0 so the jagged line represents the number not needed or used.
It means that the object in question is travelling at constant speed.
Constant speed..
If you are analyzing speed with respect to time, then you are decelerating.
It means that the object in question is moving at a constant speed.If the graph is a straight horizontal line, then the speed is zero.
Constant speed. Zero acceleration.
it means the object is moving at a constant speed
It means that the speed of the object is constant.
That an object is losing speed. It is experiencing negative acceleration.
line graph
BecAuse that would mean it is going an infinite speed. The slope of a distance time graph is the objects velocity or speed. If there is a line parallel to the distance axis, there is a vertical line. The slope of a vertical line is infinite. It is not possible to go an infinite speed.
Time is plotted on the X-axis. Speed or velocity is plotted on the Y-axis. A straight horizontal line on a speed-time graph means that speed is constant. It is not changing over time. A straight line does not mean that the object is not moving!
it means what you see the most on the graph