Scatterplots, correlation and line of best fit

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does correlation mean in statistics?

Back

Correlation refers to the statistical relationship between two variables, indicating how one variable may change in relation to another.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatterplot, showing the trend of the data points.

Front

How do you find the slope of a line?

Back

Front

What does a slope of 0 indicate?

Back

A slope of 0 indicates that there is no change in the y-value as the x-value changes, meaning the line is horizontal.

Front

What does a slope of 1 indicate?

Back

A slope of 1 indicates that for every unit increase in x, there is a corresponding unit increase in y, resulting in a 45-degree angle line.

Front

How can you use a trend line to make predictions?

Back

A trend line can be used to predict values by extending the line and finding the corresponding y-value for a given x-value.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables and to identify trends or patterns.