Scatterplots and Lines of Fit

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

What does a trend line in a scatter plot represent?

Back

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

Front

How can you use a scatter plot to make predictions?

Back

You can use the trend line to estimate values for one variable based on the value of another.

Front

What does it mean if the points in a scatter plot are closely clustered together?

Back

It indicates a strong relationship between the two data sets.

Front

What does it mean if the points in a scatter plot are widely spread out?

Back

It indicates a weak or no relationship between the two data sets.

Front

What is the purpose of a line of fit?

Back

To summarize the relationship between the data points in a scatter plot.

Front

How do you determine the slope of a line of fit?

Back

The slope is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What does a positive slope indicate in a scatter plot?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Front

What does a negative slope indicate in a scatter plot?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

What is interpolation in the context of scatter plots?

Back

Interpolation is predicting a value within the range of the data points.