Which relation is not a function? Please help it is a quiz and I really need help! 5:06pm est answer as fast as you can!

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.