8.5C and 8.5D STAAR REVIEW: Scatterplot/Trendlines

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What is a scatterplot?

Back

A scatterplot is a graph that displays two variables as points on a Cartesian plane, showing the relationship between them.

Tags

CCSS.8.SP.A.1

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What does a positive linear association in a scatterplot indicate?

Back

A positive linear association indicates that as one variable increases, the other variable also tends to increase.

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CCSS.HSF.LE.B.5

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What does a negative linear association in a scatterplot indicate?

Back

A negative linear association indicates that as one variable increases, the other variable tends to decrease.

Tags

CCSS.HSF.LE.B.5

Front

What is a trendline in a scatterplot?

Back

A trendline is a line that best represents the data points in a scatterplot, showing the general direction of the data.

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How can you predict values using a scatterplot?

Back

You can predict values by finding the corresponding point on the trendline for a given value of one variable.

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What does it mean if a scatterplot shows no apparent association?

Back

It means there is no clear relationship between the two variables, and changes in one do not predict changes in the other.

Tags

CCSS.HSS.ID.B.5

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What is the purpose of collecting data for a scatterplot?

Back

The purpose is to visually analyze the relationship between two quantitative variables.

Tags

CCSS.8.SP.A.1

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How do you determine if a scatterplot suggests a linear relationship?

Back

A scatterplot suggests a linear relationship if the points roughly form a straight line.

Tags

CCSS.8.F.A.3

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations and can affect the trendline and overall analysis.

Tags

CCSS.8.SP.A.1

Front

What is the first step in creating a scatterplot?

Back

The first step is to collect and organize the data for the two variables you want to compare.

Tags

CCSS.8.SP.A.1