The points on this graph represent a relationship between x- and y-values. Which statement about the relationship is true? 4 points in a straight line parallel to y-axis on a line graph. CLEAR CHECK It must be proportional because the points lie in a straight line. It cannot be proportional because the x-values are not whole numbers. It cannot be proportional because a straight line through the points would not go through the origin. It must be proportional because each time y increases by 3, x stays the same.