Unit 6 Test Review

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 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

What type of association does this graph show?

• Positive
• negative
• none
• all of the above

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

Calculate the line of best fit.

• y = 510x + 8750

• y = 8750 + 510x

• y = 3x + 10700

• y = 10700x + 3

Find the line of best fit

• y = 6.3x + 62

• y = 62x + 6.3

• y = 3x + 84

• y = 84x + 3

Determine the predicted income if 22 hours were worked on an assembly job.

• $207.30

• $449.60

• $691.90

• $543.30

The table shows the height and shoe sizes of several students. Use the line of best fit to predict a student's height if they wear a size 7 shoe.

• 35 inches

• 59 inches

• 17 inches

• 63 inches

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99.What was the average score for these students? _________

• 91
• 273