Scatterplots Flashcard

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 the line of best fit represent in a scatterplot?

Back

The line of best fit is a straight line that best represents the data on a scatterplot. It shows the general direction of the data points.

Front

How do you determine the line of best fit?

Back

The line of best fit can be determined by visually inspecting the scatterplot and drawing a line that minimizes the distance of all points from the line.

Front

What does it mean if there is no line of best fit for a scatterplot?

Back

If there is no line of best fit, it means that there is no clear relationship or association between the variables represented in the scatterplot.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the rise over run between two points on the line.

Front

What does a positive slope indicate in a scatterplot?

Back

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

Front

What does a negative slope indicate in a scatterplot?

Back

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

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that differs significantly from other observations in the dataset, which can affect the line of best fit.

Front

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

Back

A scatterplot shows a strong correlation if the data points are closely clustered around the line of best fit.