Each student in a psychology class is given one day to memorize the same list of 30 special characters. The lists are turned in at the end of the day, and for each succeeding day for 30 days, each student is asked to turn in a list of as many of the symbols as can be recalled. Averages are taken, and it is found that

provides a good approximation of the average number N(t) of symbols retained after t days. Graph N.

Transcribed Image Text:

5t + 20 N(t) t2 1