In such graphs the x-axis is usually (but not always) the time axis. The x-intercept represents the time(s) at which your position is at the starting point - either for the first time or later.
Chat with our AI personalities
That means the speed (the slope of the position-time graph) is decreasing.
Nothing in particular. It certainly does not represent acceleration.
Oh, dude, each individual point on a graph is called a "vertex." It's like the cool kid at the party who stands out from the crowd, you know? So yeah, next time you see a point on a graph, just give it a little nod and say, "Hey there, vertex, doing your thing."
It means that the object was travelling away from or towards the point of reference with a velocity represented by the intercept at the start of the measurement, that is, at time t = 0.
A speed graph measures the distance devided over time. Acceleration graph measures the change in speed over time.