The Function Models the Average Typing Speed S

Multiple Choice

The function models the average typing speed S , in words per minute, of a student who has been typing for t months. Use a graph of S to determine how long, to the nearest tenth of a month, it will take the student to achieve an average typing speed of 68 words per minute.

A) 5.6 months
B) 7.5 months
C) 1.8 months
D) 5.2 months
E) 1.9 months