Scatterplots and Linear Regression

Front

What is a scatterplot?

Back

A scatterplot is a type of graph that shows the relationship between two sets of data by displaying points on a grid.

Front

What does a positive correlation in a scatterplot mean?

Back

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

Front

What does a negative correlation in a scatterplot mean?

Back

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

Front

What does it mean if there is no correlation in a scatterplot?

Back

No correlation means that there is no clear relationship between the two variables.

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.

Front

How can you tell if a scatterplot shows a strong relationship?

Back

A strong relationship is shown when the points are close to the line of best fit.

Front

What is linear regression?

Back

Linear regression is a method used to find the line of best fit for a set of data.

Front

What does the slope of a line in a scatterplot represent?

Back

The slope represents how much one variable changes in relation to another variable.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis.

Front

What does it mean if the slope is negative?

Back

A negative slope means that as one variable increases, the other variable decreases.