Reading Graph Association

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. 

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

• $740
• $1000
• $550
• $1740

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

Estimate the correlation coefficient for this scatterplot.

• r = 1.2
• r = 0.89
• r = 0
• r = -0.89

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• No Correlation

Estimate the correlation coefficient for this scatterplot. 

• r = -0.9
• r = 1
• r = 0.9
• r = -1

Describe the relationship between the variables.

• Weak positive correlation
• Weak negative correlation
• Strong positive correlation
• Strong negative correlation

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

What type of association does this graph have?

• positive
• negative
• none
• all of the above

r=-0.89

• Strong positive 
• Weak positive 
• Strong negative 
• Weak negative