Correlation in Scatter Plots

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases

• As x increases, y increases

• As x decreases, y decreases

r=0.3

• Strong positive 

• Weak positive

• Strong negative

• Weak negative 

r=-0.89

• Strong positive 

• Weak positive 

• Strong negative 

• Weak negative 

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• -1.409

• .164

If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit?

• There is a weak, positive relationship

• There is a strong, positive relationship

• There is a weak, negative relationship

• There is a strong, negative relationship

In a scatterplot of the average grade point of a high school student and the average hours that he/she spend on his/her homework, you expect to see:

• very little association

• a strong association

• a weak positive association

• a strong positive association

What type of association does this scatter plot represent?

• positive linear association

• negative linear association

• no association

• nonlinear association