What equation gets you -3 , 0 , 3 , 6 , 9 ?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents