Scatterplots and Regression

Which scatterplot suggests a linear relationship between x and y?

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What does the data you created from this data in your scatter plot imply?

• strong positive correlation

• strong negative correlation

• weak negative correlation

• weak positive correlation

Write the equation for the line of best fit. Round decimals to TWO places.

Mathematical Equivalence

ON

What is the correlation coefficient r for this data set?

Round to TWO decimal places.

Mathematical Equivalence

ON

Consider the two variables: the temperature outside (x) and the number of visitors at the beach (y). Which type of scatterplot would you expect to see when graphing?

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What is the trend for this scatter plot

• Negative

• Positive

• None

Predict the score of a person who studies for 10 days.

Round to the nearest WHOLE number.

Mathematical Equivalence

ON

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

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

The linear regression equation is y = 61.93x - 1.79.  According to the model, the slope can be interpreted as:

• After 0 hours of driving, they went 61.93 miles.

• They drove at a speed of 61.93 miles per hour.

• They drove 61.93 miles total.

• They drove 61.93 hours total.