8.5C and 8.5D STAAR REVIEW: Scatterplot/Trendlines

Front

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.

Front

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.

Front

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.

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.

Front

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.

Front

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.

Front

What is the purpose of collecting data for a scatterplot?

Back

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

Front

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.

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.

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.