Analyze Scatterplot and Line of Best Fit

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• There is no line of best fit for this graph

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

Predict the grade of a student that has 7 absences.

• 50

• 45

• 70

• 60

Based on the trend line, about how many guests should be expected if the temperature is around 80 degrees?

• 8,300

• 7,300

• 8

• 9,300

What is the best prediction for the number of candies in the jar when 30 students visit her?

• 90

• 180

• 135

• 150

identify the outlier

• 30, 100

• 100, 30

• there is no outlier

Which graph has a correlation coefficient (r) of about -.6 ?

• a

• b

• c

• d

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

When you check your scatter plot to see if it is straight (linear), curved, or any other pattern you are looking at _________

• Form

• Direction

• Outlier

• Strength