The graph must advance towards negative infinity as we move towards positive infinity and vice versa since it has a negative leading coefficient and an odd degree.
As a result, the intercept on the vertical axis and the slope of the velocity coincide (commonly thought of as the "y" axis). Each of these objects started out in the same place because each of these graphs has its origin-based intercept. This graph might represent a race of some kind, with all of the competitors lined up at the starting line (although, at these speeds it must have been a race between tortoises). Since each curve has a non-zero slope at the start, if it were a race, the participants would have started moving before the event had started. It should be noted that just because the beginning location is zero, it does not follow that the initial velocity is also zero. You cannot infer anything from a curve's height.
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