Which equation represents a proportional relationship?
y=2x+10
y=311x
y=21-4
y=8x-1

You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

Answer these questions showing your work plz

Math it's appreciated. (picture provided)