Nathan is using his grandmother's recipe to make pies On Monday, he used 15 3/4 cups of sugar to make 9 pies On Tuesday, he used 23 3/4 cups of sugar to make 13 pies Which of the following must be true? (Select all that apply) A) He used 1 cup of sugar for every 1 3/4 pies he made B) He would use 14 cups of sugar to make 8 pies C) The number of cups of sugar is proportional to the number of pies he made because he used the same number of cups of sugar for each pie D) The number of cups of sugar is not porptional to the number of pies he made because the increase in the number of cups of sugar between Monday and Tuesday is greater than the increase in the number of pies E) if Nathan uses 8 3/4 cups of sugar to make 5 pies on Wednesday and then graphs the points, for all the three days, to represent the relationship between the cups of sugar used and the number of pies made, the points would not fall on a straight line