Making Predictions and Reading Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is no correlation in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one do not predict changes in the other.

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 scatterplot, showing the trend of the data.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by minimizing the distance between the line and all the data points, often using a method called least squares.

Front

What is a positive linear association?

Back

A positive linear association means that the data points tend to rise together, forming a straight line with a positive slope.

Front

What is a negative linear association?

Back

A negative linear association means that as one variable increases, the other variable decreases, forming a straight line with a negative slope.

Front

What is a nonlinear association?

Back

A nonlinear association occurs when the relationship between the variables cannot be accurately represented by a straight line.

Front

How can you predict values using a scatterplot?

Back

You can predict values by finding the corresponding point on the line of best fit for a given value of one variable.