Weekly May 2nd AA

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Describe the correlation in the graph shown.

• A) Strong Negative

• B) Strong Positive

• C) Weak Negative

• D) No Correlation

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Which with is the line of best fit?

• A) Black

• B) Orange

• C) Red

• D) Blue

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• A) The more books students read, the lower their English grade.

• B) The more books students read, the higher their English grade.

• C) The fewer books students read, the higher their English grade.

• D) No relationship exists between the number of books students read and their English grades.

The correlation coefficient is a number "r" such that: 

• -1<r<1
• -1>r>1
• -1≤r≤1
• -1≥r≤1

Carmen, Frank, Melanie, and Jose sold a total of 70 tickets to their school play.

• Carmen sold 15 tickets

• Frank sold 20 tickets

• Melanie sold 10 tickets

• Jose sold 25 tickets

Which dot plot shows the number of tickets sold by each person?

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The linear regression equation is y = 61.93x - 1.79.  Use the equation to predict how far this person will travel after 10 hours of driving.

• 10 miles
• 617.5 miles
• 0.19 miles
• 500 miles

As study time _______________, errors _______________.

• increases ; decrease
• increases ; increase
• decreases; decrease
• increases ; stays the same