Line of Best Fit

Front

What is a line of best fit used for?

Back

To make predictions.

Front

How do you use a line of best fit to make predictions?

Back

You can use the line to estimate values based on the trend shown in the scatter plot.

Front

What does a scatter plot represent?

Back

A scatter plot shows the relationship between two quantitative variables.

Front

What does the slope of the line of best fit indicate?

Back

The slope indicates the direction and strength of the relationship between the two variables.

Front

What does the correlation coefficient (r) indicate?

Back

It indicates the strength and direction of a linear relationship between two variables.

Front

What does r = -0.89 signify?

Back

It signifies a strong negative linear relationship.

Front

What is the purpose of a trend line in a scatter plot?

Back

To summarize the data and show the general direction of the relationship.

Front

How can you predict values using a line of best fit?

Back

By locating the value on the x-axis and finding the corresponding value on the y-axis along the line.

Front

What does it mean if a line of best fit does not pass through the middle of the data set?

Back

It may indicate that the line is not accurately representing the trend of the data.

Front

What is an example of using a line of best fit in real life?

Back

Predicting sales based on advertising spend.