2. A large rock is ejected from a volcano with a speed of 30m/s and at an angle 60. above the horizontal. The rock strikes the side of the volcano at an altitude of 10.0m lower than
its starting point. Calculate the horizontal displacement of the rock.
84.90m

12000j is work done

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

i think the answer is a, hope this : )