Scatter Plots

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

If a scatterplot has no correlation then...

Back

its ordered pairs have no predictable pattern.

Front

What is the equation of the line of best fit for the data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served?

Back

y = (5/3) x + 375.

Front

What type of correlation does a graph with a positive slope have?

Back

Positive correlation.

Front

Looking at a graph, if y decreases as x increases, what is the correlation between the x and y variables?

Back

Negative correlation.

Front

What does a line of best fit represent in a scatter plot?

Back

It represents the trend of the data points.

Front

What is the purpose of a scatter plot?

Back

To visualize the relationship between two quantitative variables.

Front

What does a positive correlation indicate in a scatter plot?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatter plot?

Back

As one variable increases, the other variable decreases.

Front

What does it mean if a scatter plot has no correlation?

Back

There is no predictable relationship between the two variables.