The velocity of the car at t = 3.0 s is 6.0 m/s.
To find the velocity at t = 3.0 s, we simply need to find the y-value of the graph at that point. We can see from the graph that the y-value at t = 3.0 s is 6.0 m/s.
Another way to find the velocity at a specific time is to use the slope of the graph at that point. The slope of the graph represents the acceleration of the car.
The graph shows that the automobile is accelerating uniformly from rest, with an acceleration of 2.0 m/s/s. At t = 3.0 s, the graph shows that the automobile has reached a velocity of 6.0 m/s.