Scatter Plots and Trend Lines

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, showing the general direction of the data.

Front

How can you identify a negative correlation in a scatter plot?

Back

You can identify a negative correlation if the data points slope downwards from left to right.

Front

How can you identify a positive correlation in a scatter plot?

Back

You can identify a positive correlation if the data points slope upwards from left to right.

Front

What is the purpose of using a scatter plot?

Back

The purpose of using a scatter plot is to visually display the relationship between two variables and to identify any trends or correlations.

Front

What does it mean if a scatter plot has outliers?

Back

Outliers are data points that differ significantly from other observations; they can affect the correlation and the line of best fit.

Front

What is the range of values for correlation coefficients?

Back

The range of values for correlation coefficients is from -1 to +1, where -1 indicates a perfect negative correlation, +1 indicates a perfect positive correlation, and 0 indicates no correlation.