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

How do you determine if a line is a good line of best fit?

Back

A good line of best fit minimizes the distance between the line and all the data points.

Front

What does it mean if a scatter plot shows a linear relationship?

Back

It means that as one variable increases or decreases, the other variable tends to do the same in a straight-line pattern.

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations, often lying outside the overall pattern.

Front

How can you identify an outlier on a scatter plot?

Back

An outlier appears as a point that is far away from the cluster of other points.

Front

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

Back

To make predictions and understand the relationship between variables.

Front

What does a positive slope in a line of best fit indicate?

Back

It indicates that as one variable increases, the other variable also increases.

Front

What does a negative slope in a line of best fit indicate?

Back

It indicates that as one variable increases, the other variable decreases.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.

Front

What is the formula for calculating the slope of a line?

Back

Slope (m) = (y2 - y1) / (x2 - x1) for two points (x1, y1) and (x2, y2).