Make Predictions with Lines of Best Fit

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 kind of trend is shown from this scatterplot?

• positive correlation
• negative correlation
• none
• cannot be determind

What is the line of best fit?

• f(x)= 5x+1.82
• cannot be determined
• f(x)= 1.82x + 5.02
• f(x)= 1.1x + 4.2

What is the type of correlation?

• Negative 
• no correlation
• positive 

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

What type of association does this graph show?

• Positive
• negative
• none
• all of the above

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

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