Correlation Line of Best Fit

Which graph shows a positive correlation?

• a

• b

The table shows the data for electricity generation at multiple amounts of coal used.

What is the mean electricity generated? Answer to two decimal places.

(a)  

• positive trend
• negative trend
• no trend

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.8.EE.B.5

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.8.EE.B.5

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

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.F.A.3

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

Match each scatter plot to its description.

• No Correlation

• 
• Positive Correlation

• 
• Negative Correlation

• 

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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

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

• $207.30

• $449.60

• $691.90

• $543.30

Tags

CCSS.HSF.LE.B.5