Scatter Plots & Lines of Best Fit

Front

What does it mean when two variables have a positive association?

Back

When the variables move in the same direction. They both increase.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What is a line of best fit?

Back

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

Front

How do you determine the line of best fit?

Back

The line of best fit can be determined using methods such as least squares regression, which minimizes the distance between the data points and the line.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What is the purpose of using a scatter plot?

Back

The purpose of using a scatter plot is to visually display the relationship between two variables and to identify any trends or correlations.

Front

If a scatter plot shows no clear trend, what can be said about the correlation?

Back

If there is no clear trend, it can be said that there is no correlation between the variables.

Front

What is the significance of the slope in a line of best fit?

Back

The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Front

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

Back

You can predict values by using the equation of the line of best fit to find the corresponding y-value for a given x-value.