Scatterplots

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.

Name the correlation in this graph

• Positive correlation

• Negative correlation

• No correlation

• Lots of correlation

Name the correlation in this graph

• Negative correlation

• No correlation

• Lots of correlation

• Positive correlation

Choose the correct equation for the trend line shown.

• y= (-1/3)x + 70
• y= (1/3)x - 70
• y= (-10/3)x + 70
• y= (10/3)x - 70

What is the type of association?

• Negative 
• no association
• positive 

What type of correlation does this graph have?

• positive
• negative
• none
• all of the above

Which line is the best fit line for this scatter plot?

• a

• b

• c

• d

Which line is the best fit line for this scatter plot?

• a

• b

• c

• d

Which line is the best fit line for this scatter plot?

• a

• b

• c

• d

The line of best fit _____. Check all that apply.

• should include outliers.

• must pass through multiple points.

• should have about the same number of points above and below.

• can be used to make predictions.