Fitting Lines to Scatter Plots

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship of two data sets.

Front

What is a line of best fit used for?

Back

A line of best fit is used to make predictions based on the data.

Front

Identify the outlier in the following data: 23, 34, 27, 7, 30, 26, 28, 31, 34.

Back

The outlier is 7.

Front

What does a strong, negative, linear association between variables indicate?

Back

It indicates that as one variable increases, the other variable tends to decrease in a linear manner.

Front

Which scatter plot shows a linear relationship between x and y?

Back

Graph C shows a linear relationship between x and y.

Front

What is an outlier?

Back

An outlier is a data point that differs significantly from other observations in a dataset.

Front

How can you identify an outlier in a dataset?

Back

An outlier can be identified by looking for values that are much lower or higher than the rest of the data.

Front

What does it mean if there is no association between two variables in a scatter plot?

Back

It means that changes in one variable do not predict changes in the other variable.

Front

What is the purpose of fitting a line to a scatter plot?

Back

The purpose is to summarize the relationship between the variables and make predictions.

Front

What does a weak, positive, linear association indicate?

Back

It indicates that as one variable increases, the other variable also tends to increase, but not strongly.