Scatterplots

Front

What is a scatterplot?

Back

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

Front

What does the x-axis represent in a scatterplot?

Back

The x-axis typically represents the independent variable, which is the variable that is manipulated or changed.

Front

What does the y-axis represent in a scatterplot?

Back

The y-axis typically represents the dependent variable, which is the variable that is measured or observed.

Front

What is a trend line in a scatterplot?

Back

A trend line is a straight line that best represents the data points in a scatterplot, indicating the general direction of the data.

Front

How can you determine the correlation from a scatterplot?

Back

You can determine the correlation by observing the direction of the trend line: positive correlation (upward slope), negative correlation (downward slope), or no correlation (no clear trend).

Front

What is positive correlation?

Back

Positive correlation occurs when an increase in one variable corresponds to an increase in another variable.

Front

What is negative correlation?

Back

Negative correlation occurs when an increase in one variable corresponds to a decrease in another variable.

Front

What does 'no correlation' mean in a scatterplot?

Back

No correlation means that there is no apparent relationship between the two variables; the data points do not follow a clear pattern.

Front

What is a line of best fit?

Back

A line of best fit is a straight line drawn through the scatterplot that best represents the data points, minimizing the distance between the points and the line.

Front

How do you use a scatterplot to make predictions?

Back

You can use a scatterplot to make predictions by extending the trend line to estimate the value of the dependent variable for a given independent variable.