单选题

单选题 Of the following years, which showed the least difference between elementary enrollment and secondary enrollment?

A、 2000
B、 1995
C、 1990
D、 1985
E、 1980

【正确答案】 E

【答案解析】According to the graph, in 1980, the difference between elementary enrollment and secondary enrollment was approximately 1,000 - 500, or 500 students. In every other year, the difference in enrollment was at least twice that number.

单选题 The cost of books and materials accounted for approximately 30% of the school district's annual expenditures. In 1990, what was the approximate average cost per student for books and materials?

A、 $1,500
B、 $2,000
C、 $3,000
D、 $6,000
E、 It cannot be determined from the given information.

【正确答案】 B

【答案解析】According to the graph, district expenditures in 1990 were $20 million. Therefore, the school district spent about $6 million on books and materials. The graph shows that there were 3,000 students enrolled in 1990, so the district spent $2,000 per student on books and materials.