you measure it.
Speed
Rate of change of the "vertical" variable in relation to the "horizontal" variable.
Time on horizontal, Distance on Vertical
The convention for an x-y graph is as follows: y | | |_____ x where the x-axis is horizontal and the y-axis is vertical.
No. If the horizontal axis is time, and the vertical axis is speed, and you're standing still,Then the graph is perfectly horizontal, and it coincides with the horizontal axis.
Yes the graph of a function can be a vertical or a horizontal line
Yes the graph of a function can be a vertical or a horizontal line
It is the derivative of the vertical change relative to the horizontal change - if the derivative exists. So, with the typical x-y graph, it would be dy/dx. If the graph is a straight line, then it is the change in the vertical positions between any two points divided by the change in the horizontal positions between the same two points (in the same order).
The graph you described is a speed-time plot. If the line is horizontal, that indicates no change in speed over time. In other words, there is no acceleration (acceleration is zero), since there is no change in speed.
On a typical graph, the vertical line is the y-axis, they horizontal line is the x-axis.
Graph
abscissa is horizontal and ordinate is vertical one