Scatterplots and trend lines review

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Tags

CCSS.8.SP.A.1

Front

What does a trend line represent in a scatterplot?

Back

A trend line, or line of best fit, represents the general direction that a set of data points follows in a scatterplot.

Tags

CCSS.8.EE.B.5

Front

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

Back

A positive correlation is indicated when the data points tend to rise together, meaning as one variable increases, the other variable also increases.

Tags

CCSS.HSS.ID.B.5

Front

What is a negative correlation in a scatterplot?

Back

A negative correlation occurs when one variable increases while the other variable decreases, resulting in a downward trend in the data points.

Tags

CCSS.HSS.ID.B.5

Front

What does 'no correlation' mean in the context of a scatterplot?

Back

No correlation means that there is no discernible relationship between the two variables, and the data points are scattered randomly.

Tags

CCSS.HSS.ID.B.5

Front

How do you estimate values using a trend line?

Back

To estimate values, locate the desired value on one axis, then follow the trend line to find the corresponding value on the other axis.

Front

What is the purpose of the line of best fit?

Back

The line of best fit is used to summarize the relationship between variables and make predictions based on the data.

Tags

CCSS.8.EE.B.5

Front

What is the difference between a scatterplot and a line graph?

Back

A scatterplot displays individual data points to show relationships, while a line graph connects data points with lines to show trends over time.

Front

How do you identify the line of best fit on a scatterplot?

Back

The line of best fit is identified as the line that best represents the data points, minimizing the distance between the points and the line.

Tags

CCSS.8.EE.B.5

Front

What does it mean if a scatterplot has a steep trend line?

Back

A steep trend line indicates a strong relationship between the variables, with a greater change in the dependent variable for each unit change in the independent variable.

Tags

CCSS.8.EE.B.5