Scatter Plots and Trend Lines

Choose the graph with a trend line that best fits the data.

• graph 1

• graph 2

• graph 3

• graph 4

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 140 pages. 

• 12 chapters
• 19 chapters
• 14 chapters
• 21 chapters

the slope is -5/7, what does that mean?

• gain 5 hour of sleep for 7 cups of coffee
• lose 5 hours of sleep for 7 cups of coffee
• lose 7 cups of coffee for 5 hours of sleep
• lose 5 cups of coffee for 7 hours of sleep

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

• A
• B
• C
• D

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 pages would be in a book with 6 chapters. 

• ≅100 pages
• ≅170 pages
• ≅60 pages
• ≅20 pages

The number of siblings you have and your weight would have which type of correlation? 

• Positive
• Negative
• None
• All of the above

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points

What type of correlation (association)?
The outside temperature and the amount of layers you wear. 

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

Level 1: Determine the type of correlation.

• Positive

• Negative

• No Correlation

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases
• As x increases, y increases
• As x decreases, y decreases