Trend Lines and Predictions

Front

What is a line of best fit used for?

Back

To make predictions.

Front

Which scatter plot shows a linear relationship between x and y?

Back

Graph C.

Front

Use the trend line to predict how many chapters would be in a book with 180 pages.

Back

18 chapters.

Front

What does it mean when as x increases, y decreases?

Back

Negative correlation.

Front

What does it mean when as x increases, y increases?

Back

Positive correlation.

Front

What is a scatter plot?

Back

A graph that shows the relationship between two variables.

Front

What is correlation?

Back

A statistical measure that describes the extent to which two variables change together.

Front

What is a positive correlation?

Back

A relationship where an increase in one variable leads to an increase in another.

Front

What is a negative correlation?

Back

A relationship where an increase in one variable leads to a decrease in another.

Front

What is a correlation coefficient?

Back

A numerical value that represents the strength and direction of a correlation.