A coordinate plane with a horizontal line passing through (negative 3, negative 3), (negative 3, 0) and (negative 3, 3). Which is true of the standard form of the equation of the line graphed? The value of A can be –1 if the value of C is 3 and the value of B is 0. The value of A can only be 1, the value of C can only be –3, and the value of B is 0. The standard form of the equation can be shown as 3x = –9. The standard form of the equation can only be x + 3 = 0.

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?