Consider the following collection of ordered pairs: (1,−0.98), (2,−2.9), (3,−5.2), (4,−7.4) (a) Sketch the scatterplot.

Question

Consider the following collection of ordered pairs: (1,−0.98), (2,−2.9), (3,−5.2), (4,−7.4)

1. (a) Sketch the scatterplot.
2. (b) Based on the scatterplot, predict the sign of the correlation coefficient r. Do you
3. expect r to be close to 1 or −1? Explain your answer.
4. (c) Compute the correlation coefficient and compare its sign to your answer in part
5. (b). Does the correlation coefficient reflect the scatterplot? Explain your answer.

Answer 1

slope -2.156

intercept 1.27

R-Coefficient: -0.999331185

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