Teacher Salaries The average salary of a U.S. classroom teacher is given by f(t) = 1216.879t + 31,148.869, where t is the number of years from 1990.
a. What inputs correspond to the years 1990–2009?
b. What outputs correspond to the inputs determined for 1990 and 2009?
c. Use the answers to parts (a) and (b) and the fact that the function increases to find an appropriate viewing window and graph this function.
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