Scatter Plot Review

What does the scatter plot suggest about the relationship between a person's age and the time spent per day watching TV?

• There is no association between the ages and the time spent watching TV.

• There is a positive association between the ages and the time spent watching TV.

• As the ages decrease, the time spent watching TV increases.

• As the ages increase, the time spent watching TV decreases.

When determining the line of best fit for the scatter plot shown, what does the slope appear to be?

• -3

• 1/3

• 1

• 3

Which of the following statements is true given the graph shown?

• The rate of increasing enrollment is the same for high school as college because of the overlapping time period.

• The rate of increasing enrollment is the same for high school as college because the slopes are the same.

• The rate of increasing enrollment is greater for high school than college because the slopes are the same.

• The rate of increasing enrollment is greater for high school than college because high school enrollment is always greater than college.

According to the graph, what happens to the average height of females over the age of 60?

• The average height of females over the age of 60 decreases.

• The average height of females over the age of 60 increases.

• The average height of females remains constant.

• The average height of females decreases, then increases.

One hundred 8th grade students were asked two questions:

1. How many books do you own?

2. How many movies do you own?

It was found that the relationship between number of books (x) and number of movies (y) is closely modeled by the equation y = 30 - 5x. One of the 8th graders surveyed owns 9 movies. Out of the following, which is most likely to be the number of books this student owns?

• 0

• 4

• 16

• 25

When determining the line of best fit for the scatter plot shown, what does the slope appear to be?

• -2/3

• -1/2

• -1/3

• -1/4

The scatterplot shows the arm span of 8th grade students according to their height. If a student in this class is 55 inches tall, what is their approximate arm span?

• 48 inches

• 53 inches

• 60 inches

• 68 inches

The equation y = Cx + D corresponds to a line that fits the data in the scatter plot shown. What are the signs of C and D?

• C is positive. D is negative.

• C is negative. D is positive.

• Both C and D are positive.

• Both C and D are negative.

Which of the following statements is true given the graph shown?

• The rate of increasing enrollment for trade school is the same as the rate of decreasing enrollment in college because the slopes are reciprocals of each other.

• The rate of increasing enrollment for trade school is greater than the rate of decreasing college enrollment because the slopes are reciprocals of each other.

• The rate of increasing enrollment for trade school is greater than the rate of decreasing enrollment in college because the slope of the trade school enrollment is steeper than the slope of college enrollment.

• The rate of increasing enrollment is greater for trade school than the decreasing rate of college enrollment because trade school enrollment is always greater than college enrollment.

Students collected leaves from several different trees of the same kind. The lengths, L (in cm), of the leaves and their mass, m (in grams) could be described by the equation below.

m = 1.5L - 3

What length does the equation predict for a leaf weighing 4.5 grams?

• 1 cm

• 3.75 cm

• 5 cm

• 11.25 cm