I am reading the tutorial on physics classroom.com, and am at Meaning of Slope for a v-t graph. It gives data for an object experiencing an acceleration:

This is the corresponding chart for the object's velocity:

At 0 seconds the position of the object is 0 meters. And the velocity is 0 m/s which makes sense. After 1 second, the object travels 5 meters. The chart says that its velocity is 10 m/s at time equals 1 second. How is this possible if the object only travelled 5 meters within that second? Shouldn't the velocity be 5 m/s and not 10 m/s?