Activity
In this activity, you will identify key features of quadratic functions by looking at their graphs and table of values.
Question 1
List these key features for the quadratic function shown in the graph:
• x-intercepts
• y-intercept
• vertex
• end behavior
• domain
• range
. decreasing interval
• increasing interval
• Intervals on which the function is positive
• Interval on which the function is negative
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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?