Analyze Two Variable Relationships

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

What term represents the measure how strong or weak the relationship between 2 quantitative variables are.

• Scatter Plot

• Causation

• Correlation

• Line of best fit

Describe the correlation of the data shown in the graph

• Negative correlation

• No correlation

• Positive correlation

• Constant correlation

What type of correlation does this graph have?

• Strong Positive correlation

• Strong Negative correlation

• No correlation

• Weak positive correlation

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

If Gold's Gym paid $250 for each TV, how many did they buy?

• 35

• 30

• 45

• 20

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Which statement best represents this relationship?

• There is no relationship between the number of miles driven and the amount of gas remaining in the tank
• As the number of miles driven increases, the amount of gas remaining in the tank increases.
• As the number of miles driven increases, the amount of gas remaining in the tank decreases.
• A relationship cannot be determined from this scatter plot

Describe the correlation coefficient if

r = 0.90

• Positive, weak

• Positive, strong

• Negative, weak

• Negative, strong

Which answer would most likely be the correlation coefficient of the given data:

• .9620

• -.9643

• 1.409

• .6264