Big brain only. don't answer if you are a wrinkled brain

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0