(1) 100 students account for 648 =18 of the class;

(2) The score of 85 ~100 accounts for 2448 =12 of the total class;

(3)70 ~ 85 points account for1248 =14 of the total class size;

(4) 648 =18 of the total class size of 60 ~ 70 points;

(5) The sum of the proportions of the four scores is 18+ 12+? 14+ 18= 1;

(6) According to the meaning of the question, 24 people scored 85 ~ 100, so the number of people scored 85 ~ 100 was the largest;

(7) As shown in the figure below.