Furthermore, the slope is decreasing over time meaning that the acceleration is decreasing resulting in the slowing down of the particle. If you were to find the slope of the equation for the graph, it would be a positive slope, and the slope of a velocity graph is the acceleration so the acceleration of the object is positive. The velocity graph is approaching the t-axis and will eventually equal zero for velocity which means the object is slowing down. Acceleration decreasing? Slowing down?