Displacement, Average Speed, and Average Velocity

[person100]

Okay so I don't understand how to do the displacement of distance and time on a graph. I also need help with figuring out the average speed and average velocity. The graph deals with a Turtle's journey.
On the Y-axis of the graph is distance in meters and the x-axis is time in minutes.
The y-axis goes from 1-23 and the x going by threes all the up to 66.
So the coordinates to the dots on the graph are the following: (3,2) (6,4) (12,6) (18,8) (24,10) (28,8) (30,7) (35,10) (40,12) (46,14) (51,14) (54,17) (57,20) (65,20) (66,23) *Also the total distance the turtle traveled was 29 m.

The following question's are:
1. What was the turtle's displacement?
2. What was the turtle's average speed?
3. What was the turtle's average velocity?



My answers so far:
1. 23-0=23 23/66= 2.9 m
2. 29/66=2.3 m
3. I don't even know where to begin for this one...

 

[haruspex]

Your first two answers are correct, except that you have the units wrong on one of them.
Displacement is a vector, velocity is a vector. Average velocity is displacement/time.