Can a function have more then one output for any input

Alarge rectangle is divided into four smaller rectangles.

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply