Scatter Plots & Predictions Warmup

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

Answer explanation

Based on the trend line, a book with 180 pages would have approximately 18 chapters.

Tags

8.5.D

What is a line of best fit(aka tend line) used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

Answer explanation

A line of best fit is used to make predictions based on the trend shown by the data points, not just to connect them or make the graph visually appealing.

Tags

8.5.D

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Answer explanation

The correct choice is 'Yes' because the line is an accurate line estimate of best fit for the data.

Tags

8.5.D

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.

Answer explanation

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

Tags

8.5.D

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

• A

• B

• C

• D

Answer explanation

The line of best fit for the scatter plot is represented by choice C.

Tags

8.5.D

The scatterplot represents the heights and weights of a group of people.

Based on the trend line, what would be the weight of a person who is 72 inches tall?

• About 180 lbs

• About 163 lbs

• About 153 lbs

• About 145 lbs

Answer explanation

Based on the trend line in the scatterplot, a person who is 72 inches tall would weigh about 163 lbs, as indicated by the trend line.

Tags

8.5.D