Why do equivalent ratios form a straight line when graphed? A.)The vertical distance between points is constant, and the horizontal distance between points increases with each
point.
B.)The ratio of the change in y-values to the change in x-values is equivalent for any two points in a graph of equivalent
ratios.
C.)The horizontal distance between points is constant, and the vertical distance between points increases with each
point.
D.)The y-values of equivalent ratios increase at a constant rate, and the x-values decrease at a constant rate.

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?