Wind blowing across suspended power lines may

cause the power lines to vibrate at their natural

frequency. This often produces audible sound

waves. This phenomenon, often called an

Aeolian harp, is an example of

(1) diffraction (3) refraction

(2) the Doppler effect (4) resonance

  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.