Look instead of sending the questions one by one I am going send them together please help

The following graph shows the consumer price index (cpi) for a fictional country from 1970 to 1980? a.) 1976 - 1978b.) 1972 - 1974c.) 1974 - 1976d.) 1978 - 1980

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Ineed with the quizzes in apex mathematics ii