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.

Tags

CCSS.8.SP.A.1

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.

Tags

CCSS.8.SP.A.2

Front

How can you determine if there is a positive correlation in a scatterplot?

Back

A positive correlation is indicated when the line of best fit slopes upwards, meaning as one variable increases, the other variable also increases.

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation in a scatterplot indicate?

Back

A negative correlation is indicated when the line of best fit slopes downwards, meaning as one variable increases, the other variable decreases.

Tags

CCSS.HSS.ID.B.5

Front

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

Back

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

Tags

CCSS.HSS.ID.B.5

Front

How do you interpret the slope of the line of best fit?

Back

The slope of the line of best fit indicates the rate of change between the two variables. A steeper slope means a stronger relationship.

Tags

CCSS.8.EE.B.5

Front

What is the purpose of using a line of best fit?

Back

The purpose of using a line of best fit is to make predictions about one variable based on the value of another variable.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.SP.A.1

Front

How can you find the predicted value using the line of best fit?

Back

To find the predicted value, you can substitute the known value of one variable into the equation of the line of best fit.

Tags

CCSS.HSF.IF.A.2

Front

What is the difference between a strong and weak correlation?

Back

A strong correlation means the data points are close to the line of best fit, while a weak correlation means the points are more spread out.

Tags

CCSS.HSS.ID.B.5