Scatterplot Trend Line

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

Which sentence describes the relationship shown on this scatterplot?

• As the temperature decreases, the visitors increase. 

• As the temperature increases, the number of visitors increases. 

• As the visitors increase, the temperature decreases. 

• No correlation

Martin and Daisy are arguing about which graph below represents a non-linear relationship. Martin believes Graph A represents a non-linear relationship, but Daisy thinks it is Graph B. Which of the following statements explain who is correct and why? 

• Graph A, because a trend line cannot be drawn through the data points

• Graph B because a trend line cannot be drawn through the data points

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

Choose the correct equation for the trend line shown.

• y= (-1/3)x + 70

• y= (1/3)x - 70

• y= (-10/3)x + 70

• y= (10/3)x - 70

Which best describes the scatter plot below?

• Negative Association; Linear

• Negative Association; Non-Linear

• Positive Association; Linear

• Positive Association; Non-Linear

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 

• As the temperature increases, the number of visitors increases. 

• As the visitors increase, the temperature decreases. 

• No correlation

The following scatter plot shows the weights and lengths of some dinosaurs.  Which statement accurately describes the information?

• The information shows a positive correlation.  The weight of a dinosaur tends to increase according to its length.

• The information shows a negative correlation.  the weight of a dinosaur tends to decrease according to its length.

• The information shows no correlation.  The weight and length vary according to the type of dinosaur.

• The information shows no correlation.  The relationship between the weight and length of a dinosaur is uncertain.