Which discribes what a velocity/time graph would look like with no accelaration

Which object is most likely represented by a dot?

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?