The right answer is c.
First, you must notice that the x-axis represents the Time (measured in second) Odina walked down the hall and the y-axis represents the Distance (measured in meters) she traveled. At this graph you can notice that just in 2 seconds the distance she traveled is 2.6 meters as indicated in the statement above. As the graph is a line, this number will be a constant, that is, she will move 2.6m every 2.0s, so:
[tex]\frac{2.6m}{2s}=1.3m/s[/tex]
This number represents the velocity of Odina. Therefore, she moves at a rate of 1.3 meters per second