Bell-Ringer 11/30

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• No Correlation

Which best describes the form of this scatterplot?

• linear

• nonlinear

• scattered

• no correlation

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Describe a correlation with a coefficient of r=0.3

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Which scatter plot diagram shows the strongest positive correlation?

• 
• 
• 
• 

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

What is the line of best fit?

• f(x)= 5x+1.82

• cannot be determined

• f(x)= 1.82x + 5.02

• f(x)= 1.1x + 4.2

Using your linear regression, what is y when x is 30?

• 61.59
• 52.46
• 57.94
• 59.76

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

• y = 1.5x + 12
• y = 12x + 1.5
• y = 0.67x - 8
• y = -8x + 0.67