Exploring Scatterplots and Lines of Best Fit

What is the main topic of Section 2.6 in Algebra 2?

• Quadratic Equations

• Scatter Plots and Lines of Best Fit

• Trigonometric Functions

• Probability and Statistics

What does a perfect positive correlation look like on a scatter plot?

• Points form a line with a negative slope

• Points form a line with a positive slope

• Points form a horizontal line

• Points are scattered randomly

What is the range of the correlation coefficient 'R'?

• 0 to 10

• 0 to 1

• -1 to 0

• -1 to 1

In the given example, what does the point (4, 119) represent?

• A weak positive correlation

• A perfect negative correlation

• A perfect positive correlation

• An outlier

What does a strong negative correlation indicate about the data points?

• They form a line with a positive slope

• They form a horizontal line

• They are scattered randomly

• They form a line with a negative slope

How do you approximate the best fitting line for a scatter plot?

• By connecting the first and last points

• By drawing a line through as many points as possible

• By drawing a horizontal line

• By drawing a line through the origin

What is the slope of the best fitting line in the given example?

• 23

• -23

• 7.7

• -7.7

What does the slope of the best fitting line represent in the context of the example?

• The total number of adult softball teams

• The number of adult softball teams decreasing per year

• The number of adult softball teams increasing per year

• The number of years since 1999

How many years have passed since 1999 to predict the number of softball teams in 2010?

• 10 years

• 11 years

• 13 years

• 12 years

What is the predicted number of adult softball teams in 2010 using the model?

• 163 thousand

• 78.3 thousand

• 143 thousand

• 119 thousand