Combined SAT scores in the United States could be approximated by in the years 1968 - 1988. Here t is the number of years since 1968, and T is the combined SAT score average for the United States. Find all points of inflection of the graph of T , and interpret the result.
A)(20, 904.12)
B)(18.71, 903.81)
C)(0, 0)
D)(15.85, 903.33), (21.58, 904.30)
E)(0, 0), (20, 904.12)

Question

Combined SAT scores in the United States could be approximated by  in the years 1968 - 1988. Here t is the number of years since 1968, and T is the combined SAT score average for the United States. Find all points of inflection of the graph of T , and interpret the result.
A)(20, 904.12) 
B)(18.71, 903.81) 
C)(0, 0) 
D)(15.85, 903.33), (21.58, 904.30) 
E)(0, 0), (20, 904.12)

Quizplus · Accepted Answer

The Answer of Combined SAT scores in the United States could be approximated by  in the years 1968 - 1988. Here t is the number of years since 1968, and T is the combined SAT score average for the United States. Find all points of inflection of the graph of T , and interpret the result.
A)(20, 904.12) 
B)(18.71, 903.81) 
C)(0, 0) 
D)(15.85, 903.33), (21.58, 904.30) 
E)(0, 0), (20, 904.12)

Combined SAT Scores in the United States Could Be Approximated