Scatterplot and Line of Fit Review

What is the type of association?

• Negative Linear Association

• No Association

• Positive Linear Association 

• Nonlinear Association

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

Tags

CCSS.8.EE.B.5

Describe the relationship between the variables.

• There is no relationship between the variables

• As the age increases, the height increases

• As the age increases, the height decreases

• As the height decreases, the age decreases

How would you describe a strong association?

• There is not enough evidence to tell.

• The two data sets provide plenty of data.

• The data points are closely clustered around the trend line on the scatterplot.

• There are several outliers.

Can you use the trend line to describe the association between the two sets of data for this graph?

• Yes, the more data points the better the trend line.

• Yes, there is a strong association between the number of ladybugs and the number of house flies.

• No, there is no association between the two data sets.

• No, there is a nonlinear association between ladybugs and house flies.

What are the coordinates of the outlier?

• (9,1)

• (0,3)

• (1,9)

• There is not an outlier.

What is a cluster?

• All of the points on the graph are spread out without a pattern.

• A group of points that lie close together.

• An area on the graph that contains no data.

• A data point that is set off from the other data points.

A group of friends recorded the time it took to ride their bikes around the park. The scatterplot shows their results with the line of best fit.

Using the line of best fit, which is closer to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

Oren plants a new vegetable garden each year for 14 years. The scatterplot shows the relationship between the number of seeds he plants and the number of plants that grow. Which number best represents the slope of the line of best fit through the data?

• -10

• -1/10

• 1/10

• 10

Tags

CCSS.8.EE.B.5

The scatterplot shows the relationship between the length of a long-distance phone call and the cost of the phone call.

Based on the line of best fit for the scatterplot, which of the following amounts is closest to the cost of a 120 minute phone call?

• $10

• $12

• $15

• $20