Plot two numbers that are a distance of 3/8 unit from 1/4 on the number line.

yes. we do proportions in probabilities.

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).