Investigating Data, Line of Best Fit

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

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

Which line is the best line of best fit?

• a

• b

• c

• i don't see any lines

What are the coordinates of the outlier?

• (1,9)

• (9,1)

• (2,2)

• y=x

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

• a

• b

• c

• 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

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

• $207.30

• $449.60

• $691.90

• $543.30

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• 1.409

• .6864

What type of Correlation?

• Positive Correlation

• Negative Correlation

• No Correlation