Scatterplots and Trendlines

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

What does a trendline represent in a scatter plot?

Back

A trendline shows the general direction or pattern of the data points in a scatter plot.

Front

What is an outlier in a scatter plot?

Back

An outlier is a point that is far outside the main cluster of points/ordered pairs.

Front

How can you estimate values using a scatter plot?

Back

You can estimate values by finding the corresponding point on the trendline for a given input.

Front

What is the purpose of using scatter plots?

Back

Scatter plots are used to visualize the relationship between two quantitative variables.

Front

What does a positive trendline indicate?

Back

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

Front

What does a negative trendline indicate?

Back

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

Front

What is the formula for calculating the slope of a trendline?

Back

The slope is calculated as (change in y) / (change in x).

Front

What does a flat trendline indicate?

Back

A flat trendline indicates no significant relationship between the two variables.

Front

How can you identify an outlier in a scatter plot?

Back

An outlier can be identified as a point that lies far away from the other points in the scatter plot.