Solve the problem.The following graph shows the private, public and total national school enrollment for students for select years from 1980 through 2010.
1980199020002010Yeari) How is the graph for total school enrollment, T, determined from the graph of the private enrollment, r, and 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. |
iii) 1980-1990
B.
| i) | T is the difference of r and u. |
iii) 2000-2010
C.
| i) | T is the sum of r and u. |
iii) 2000-2010
D.
| i) | T is the sum of r and u. |
iii) 1990-2000
Answer: C
Mathematics
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