We will have that the only graph that could represent the heigth of a rocket is graph A. Assuming that the x-axis represents the ground, then after some time it will go back to it.
Answer:
It will take 6 hours to complete the biking path.
To figure out R, add 1.97+0.65 together. 1.97+.065=2.62
You should graph it to find out, but you will see that (2, 5) does not lie on the line that the other coordinates do.