Closing the gender gap in education the following graph shows the ratio of the number of bachelor's degrees earned by women to that of men from 1960 through 1990.
A. Write the rule for the function f giving the ratio of the number of bachelor's degrees earned by women to that of men in year t, with t = 0 corresponding to 1960. Hint: the function f is defined piecewise and is linear over each of two subintervals.
B. How fast was the ratio changing in the period from 1960 to 1980? From 1980 to 1990 ?
C. In what year (approximately) was the number of bachelor's degrees earned by women equal for the first time to that earned by men?