Solve the problem.
-The following graph shows the private, public and total national school enrollment for students for selectyears from 1970 through 2000. i)How is the graph for total school enrollment, T, determined from the graph of the private enrollment, r,the public enrollment, u?ii)During which 10-year period did the total number of students enrolled increase the least?iii)During which 10-year period did the total number of students enrolled increase the most?
A)i)T is the sum of r and u. ii)1970 - 1980 Iii)1990-2000
B)i)T is the sum of r and u. ii)1990-2000 Iii)1970-1980
C)i)T is the sum of r and u. ii)1970 - 1980 Iii)1980-1990
D)i)T is the difference of r and u. ii)1970 - 1980 Iii)1990-2000

Question

Solve the problem.
-The following graph shows the private, public and total national school enrollment for students for selectyears from 1970 through 2000.  i)How is the graph for total school enrollment, T, determined from the graph of the private enrollment, r,the public enrollment, u?ii)During which 10-year period did the total number of students enrolled increase the least?iii)During which 10-year period did the total number of students enrolled increase the most?
A)i)T is the sum of r and u. ii)1970 - 1980 Iii)1990-2000 
B)i)T is the sum of r and u. ii)1990-2000 Iii)1970-1980 
C)i)T is the sum of r and u. ii)1970 - 1980 Iii)1980-1990 
D)i)T is the difference of r and u. ii)1970 - 1980 Iii)1990-2000

Quizplus · Accepted Answer

i) The graph shows private enrollment (r) and public enrollment (u) separately. To get the total enrollment (T), we need to add up the private and public enrollment for each year.
ii) Looking at the graph, we can see that the smallest increase in total enrollment was between 1970-1980. During this period, the total enrollment only increased by about 5 million students.
iii) The largest increase in total enrollment was between 1990-2000. During this period, the total enrollment increased by about 17 million students. i) The graph for total school enrollment, T, is determined by adding the values of private enrollment, r, and public enrollment, u, for each year.
ii) The total number of students enrolled increased the least from 1970-1980. During this period, there was a slight decrease in private enrollment while public enrollment increased slightly, leading to a small overall increase in total enrollment.
iii) The total number of students enrolled increased the most from 1990-2000. During this period, both private and public enrollment showed significant increases, leading to a large overall increase in total enrollment.

Solve the Problem. -The Following Graph Shows the Private, Public and Total National