Line of Best Fit

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, showing the trend of the data points.

Front

What does a positive correlation indicate in a scatter plot?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatter plot?

Back

As one variable increases, the other variable decreases.

Front

What does a correlation coefficient (r) of 0 indicate?

Back

No correlation between the two variables.

Front

What does a correlation coefficient (r) of 1 indicate?

Back

Perfect positive correlation between the two variables.

Front

What does a correlation coefficient (r) of -1 indicate?

Back

Perfect negative correlation between the two variables.

Front

How do you determine the slope of a line of best fit?

Back

By calculating the change in y over the change in x (rise over run) between two points on the line.

Front

What is the purpose of using a line of best fit in data analysis?

Back

To make predictions about one variable based on the value of another variable.

Front

What is the difference between linear and exponential relationships?

Back

Linear relationships have a constant rate of change, while exponential relationships increase or decrease at a variable rate.

Front

How can you visually identify a strong correlation in a scatter plot?

Back

Data points are closely clustered around the line of best fit.