STAAR DAY 8

Which scatterplot suggests a linear relationship between x and y?

Mrs. Collins made a scatterplot to show the relationship between the number of absences a student in her class has and the student's final exam score. Based on this scatterplot, approximately what score should a student with 6 absences expect to receive on the final exam?

• 65

• 92

• 67

• 76

The scatterplot below shows movie theaters with different numbers of screens and their average weekly attendance. Based on the trend in the scatterplot, approximately how many people will be in attendance at a movie theater with 8 screens?

• 90

• 105

• 85

• 140

The scatterplot shows the number of free throws that different basketball players attempted and the number that each player made. Based on the trend in the data, approximately how many free throws would a player be expected to make if he attempted 60 free throws?

• 50

• 35

• 25

• 60

The graph below shows the balance remaining on Jason's loan after he makes each payment. Based on this graph, what will be the balance remaining on Jason's loan after he makes the 12th payment?

• $750

• $150

• $450

• $300

A dentist made the scatterplot below to show the number of cavities her patients had as it relates to the number of times they flossed their teeth each week. Which of the following best describes the correlation for the data?

• Positive correlation

• Nonlinear correlation

• Negative correlation

• No correlation

A teacher collected data on 20 students for two different quizzes. The scatterplot below shows the relationship between the number of points scored on Quiz 1 and the number of points scored on Quiz 2. Which statement describes the data?

• The number of points scored on Quiz 2 was less than the number of points scored on Quiz 1 for any student who scored at least 50 points on Quiz 1.

• The number of points scored on Quiz 2 was greater than the number of points scored on Quiz 1 for any student who scored 50 or fewer points on Quiz 1.

• The number of points scored on Quiz 2 was greater than the number of points scored on Quiz 1 for any student who scored at least 50 points on Quiz 1.

• The number of points scored on Quiz 2 was less than the number of points scored on Quiz 1 for any student who scored 50 or fewer points on Quiz 1.

The scatterplot shows the relationship between the distance that students traveled to get to school and the number of times those students were tardy during the school year. The principal of the school wants to use this information to help him determine if there is a correlation between distance traveled and the number of times tardy. Which statement is a reasonable conclusion that the principal could make?

• A student who travels 1.5 miles to get to school will be tardy 9 times during the school year.

• A student who travels more than 3 miles to get to school will be tardy at least 7 times during the school year.

• There is no correlation between the distance a student travels to get to school and the number of times the student will be tardy during the school year.

• There is a nonlinear correlation between the distance a student travels to get to school and the number of times the student will be tardy during the school year.

The table shows the number of contacts six people each have stored in their cell phone. What is the mean absolute deviation for this set of data?

• 71

• 24

• 4

• 13

10. 10. look at the set of data below. What is the mean absolute deviation of the data?         21,14,30,38,42

Mathematical Equivalence

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