Scatterplots and Trend Lines Review

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

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

What does the x variable represent?

• The number of laps

• The amount of time in hours

• The amount of time in minutes

• How long it takes to go 0 laps

What is a line of best fit 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

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 220 pages.

• 22 chapters

• 20 chapters

• 18 chapters

• 26 chapters

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which best describes the dependent variable, y?

• Number of books read

• Grades in English

• Book Reading and English Grades

• 120 or 40

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam? 

• 65

• 92

• 70

• 76

Which point on the scatter plot represents a hamburger that has 19 grams of fat and 400 Calories? 

• Point A 

• Point B

• Point C

• Point D