Based on the results of the simulation, the experimental probability of a group having four students from the same grade level is a0%.

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

the ordered pairs for the given function are of the form