Unit 9 Flashcard Review

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot. It is used to make predictions about the relationship between variables.

Front

What is the equation of the line of best fit for the given data?

Back

f(x) = 1.82x + 5.02

Front

What does a correlation coefficient of r = -0.9 indicate?

Back

A correlation coefficient of r = -0.9 indicates a strong negative correlation between the two variables.

Front

What does a correlation coefficient of r = 0.89 indicate?

Back

A correlation coefficient of r = 0.89 indicates a strong positive correlation between the two variables.

Front

What does a correlation coefficient of r = 0 mean?

Back

A correlation coefficient of r = 0 indicates no correlation between the two variables.

Front

What does a correlation coefficient of r = -1 indicate?

Back

A correlation coefficient of r = -1 indicates a perfect negative correlation between the two variables.

Front

What is the significance of a strong positive correlation (e.g., r = 0.92)?

Back

A strong positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to make predictions based on the data represented in a scatter plot.

Front

What does it mean if the line of best fit has a positive slope?

Back

A positive slope indicates that there is a positive relationship between the two variables, meaning as one increases, the other also increases.

Front

What does it mean if the line of best fit has a negative slope?

Back

A negative slope indicates that there is a negative relationship between the two variables, meaning as one increases, the other decreases.