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7-18.

Look at the scatterplots and use your experience to decide which statement fits each scatterplot. If there is a relationship, describe it in a sentence.

  1. A first quadrant scatterplot where the points are scattered, and generally, the points with lower, X values, have lower, Y values, and the points with higher, X values, have higher, Y values.

  1. A first quadrant scatterplot where the points are  scattered, and generally, the points with lower, X values, have higher, Y values, and the points with higher, X values, have lower, Y values.

  1. A first quadrant scatterplot where the points are very scattered, with no clear indication for the location of y values, based on the location of x values.

  1. A first quadrant scatterplot where the points are  scattered, and no matter the location of the x values, the y values are in the center vertically.

  1. A city’s average daytime temperature in January and its latitude. Recall that the equator is at latitude and the poles are at latitude.

    The North Pole has a much greater latitude than the equator but the temperature is much colder at the North Pole. So as latitude increases, average daytime temperature decreases. Which plot does this correspond to?

    ii.

  2. Weight of a car and its speed in a traffic jam on the freeway.

    In a traffic jam, is anyone going significantly faster than anyone else?

    iv.

  3. Number of pets a student has at home and grades.

    Assume that the time it takes to care for the pets is not significant enough to take away from studying time.

  4. Cost of a person’s home and the value of car.

    Generally, people with more expensive houses drive more expensive cars.