The points on this graph represent a relationship between x- and y-values. Which statement about the relationship is true? Line graph that starts at (0, 0). 4 points are plotted on line that are in a line parallel to x axis.

It must be proportional because the points lie in a straight line.

It must be proportional because each time x increases by 2, y stays the same.

It cannot be proportional because the y-values are not whole numbers.

It cannot be proportional because a straight line through the points does not go through the origin.