2.3 position vs. time graphs\n34. what is the slope of a straight line graph of position vs. time?\na…

Brief Explanations:

In physics, velocity is defined as the rate of change of position with respect to time. On a position - time graph, the slope represents the change in position ($\Delta x$) over the change in time ($\Delta t$), which is the formula for velocity ($v=\frac{\Delta x}{\Delta t}$).

Answer:

A. Velocity