Scatter Plots and Trend Lines

Front

What is a scatter plot?

Back

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

Front

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

Back

A line of best fit is a straight line that best represents the data points in a scatter plot, indicating the overall trend of the data.

Front

What does a positive correlation in a scatter plot indicate?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What is the slope of a line in a scatter plot?

Back

The slope of a line in a scatter plot indicates the rate of change between the two variables.

Front

How do you interpret a slope of -5/7?

Back

A slope of -5/7 means that for every 7 units increase in the x-variable, the y-variable decreases by 5 units.

Front

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

Back

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

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 quantitative variables and identify trends.

Front

How can you determine the line of best fit?

Back

The line of best fit can be determined by visually inspecting the scatter plot and drawing a line that minimizes the distance from all points.

Front

What is an example of a negative correlation?

Back

An example of a negative correlation is the relationship between the age of a car and its value; as the car gets older, its value decreases.