Scatterplots & Trend Lines

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 a trend line represent in a scatterplot?

Back

A trend line is a straight line that best represents the data on a scatterplot. It shows the general direction (trend) of the data points.

Tags

CCSS.8.EE.B.5

Front

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

Back

Tags

CCSS.8.EE.B.5

Front

How do you determine the slope of a trend line?

Back

The slope of a trend line is determined by the change in the y-values divided by the change in the x-values (rise over run).

Tags

CCSS.8.EE.B.5

Front

What does a positive slope indicate in a trend line?

Back

A positive slope indicates that as the x-values increase, the y-values also increase, showing a positive correlation between the two variables.

Tags

CCSS.8.EE.B.5

Front

What does a negative slope indicate in a trend line?

Back

A negative slope indicates that as the x-values increase, the y-values decrease, showing a negative correlation between the two variables.

Tags

CCSS.8.EE.B.5

Front

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

Back

If there is no trend line, it means there is no clear relationship or association between the variables being plotted.

Front

What is a positive correlation?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What is a negative correlation?

Back

A negative correlation means that as one variable increases, the other variable tends to decrease.

Tags

CCSS.HSS.ID.B.5

Front

What is the y-intercept in the equation of a trend line?

Back

Tags

CCSS.HSF.LE.B.5