3.1 Scatter Plots

Front

What is a scatter plot?

Back

A graph that uses dots to represent the values obtained for two different variables.

Front

What might a scatter plot be used for in real life?

Back

To analyze the relationship between height and shoe size.

Front

What does a downward sloping line in a scatter plot indicate about the relationship between two variables?

Back

Negative correlation.

Front

How can you tell if a scatter plot shows a strong correlation between two variables?

Back

The dots form a clear line.

Front

What is the line of best fit?

Back

A line that best represents the trend in the data.

Front

What does a positive correlation in a scatter plot look like?

Back

As one variable increases, the other variable also increases.

Front

What does no correlation in a scatter plot indicate?

Back

There is no apparent relationship between the two variables.

Front

How do you interpret the slope of a line in a scatter plot?

Back

The slope indicates the direction and strength of the relationship between the variables.

Front

What is the purpose of the line of best fit?

Back

To summarize the relationship between the variables and make predictions.

Front

What does a scatter plot with widely spread dots indicate?

Back

A weak correlation between the two variables.