Scatter plot & best fit lines

Front

What is a scatter plot?

Back

A scatter plot is a type of 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 in a scatter plot indicate?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Tags

CCSS.HSS.ID.B.5

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 scatter plot, used to make predictions.

Tags

CCSS.8.SP.A.2

Front

How can you determine the type of correlation from a scatter plot?

Back

By observing the direction of the points: if they trend upwards, it's positive; if they trend downwards, it's negative; if they are scattered without a clear trend, there is no correlation.

Tags

CCSS.HSS.ID.B.5

Front

What does 'no correlation' mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables being plotted.

Tags

CCSS.HSF-LE.A.1B

Front

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

Back

The purpose is to make predictions about one variable based on the value of another variable.

Tags

CCSS.8.EE.B.5

Front

How do you identify a linear relationship in a scatter plot?

Back

A linear relationship is identified when the points on the scatter plot form a straight line or close to a straight line.

Tags

CCSS.8.F.A.3

Front

What is the difference between a linear and a nonlinear relationship?

Back

A linear relationship can be represented by a straight line, while a nonlinear relationship cannot be represented by a straight line and may curve.

Tags

CCSS.8.F.A.3

Front

What does the slope of the line of best fit represent?

Back

The slope represents the rate of change between the two variables; a steeper slope indicates a stronger relationship.

Tags

CCSS.8.EE.B.5