Hello can u tell me if my answer and work is correct and if not tell me

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.

These box plots show the number of electoral votes one by democratic and republican presidential candidates for the elections from 1984 through 2012. which statement best compares the spread of the data sets

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)