Scatterplots quiz Grade 9 Mrs. Harmon

The scatterplot shows the average number of hours each of 13 people spends at work every week and the average number of hours each of them spends on recreational activities every week.

Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities each week?

• 34 h

• 78 h

• 55 h

• 65 h

What kind of correlation does this scatterplot show?

• negative correlation
• no correlation
• positive correlation

What type of correlation does this scatterplot represent?

• negative correlation
• no correlation
• positive correlation

What type of correlation does this scatterplot represent?

• positive correlation
• no correlation
• negative correlation

Using the line of best fit, what is mostly likely the average for a student that was to get 10 hours of sleep a night?

• 61
• 80
• 99
• 85

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

Looking at the graph, what is the correlation between the x and y variables?

• y increases as x increases
• y is constant
• y decreases as x descreases
• y decreases as x increases

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

The number of siblings you have and your weight. 

• Positive correlation
• Negative correlation
• No correlation
• All of the above

The height of students and their scores on a test.

• positive correlation
• negative correlation
• no correlation