Trend Lines and Scatter Plots

Based on this data, how much money would the carpenter earn from a job that took 3 days to complete?

• $740
• $1000
• $550
• $1740

If a scatterplot has no correlation then...

• ...it has no ordered pairs
• ...it has ordered pairs that have a negative pattern
• ...its ordered pairs have no predictable pattern
• ...if it makes a lion on a graph (roar!)

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.

As x increases, y increases

• correlation coefficient
• causation
• positive correlation
• negative correlation

What is a line of best fit used for?

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

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

What is the correlation?

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

What is the type of association (correlation)?

• Negative 
• no association
• positive 

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

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