1.   What is implied when it is said that x and y have a negative correlation?
    A. When the value of x increases, the value of y increases.
    B. When the value of x increases, the value of y does not necessarily increase or decrease.
    C. When the value of x is negative, the value of y negative.
    D. When the value of x increases, the value of y decreases.
    Hint

  2.   Which relationship would most likely have a positive correlation?
    A. the rate at which a train travels, and the time it takes for it to reach its destination.
    B. the number of tickets sold for a baseball game, and the number of hotdogs sold at the game.
    C. the amount of memory in computer, and the number of keys on the keyboard.
    D. the number of miles driven, and the number of gallons of gas in the car.
    Hint

  3.   Which scatter plot would most likely represent the relationship between d, the distance that a person throwing darts stands from a target, and c, the number of times he or she hits the center?
    A. B.
    C. D.
    Hint

  4.   A line of best-fit should not be drawn for which of the following graphs.
    A. B.
    C. D.
    Hint

  5.   Which scatter plot shows that x and y have no correlation?
    A. B.
    C. D.
    Hint