Lines of Best Fit

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 overall trend of the data.

Front

What does it mean if a line does not go through the middle of the data set?

Back

It means that the line is not accurately representing the trend of the data, and therefore is not a line of best fit.

Front

What is a linear relationship?

Back

A linear relationship is a relationship between two variables that can be represented by a straight line on a graph.

Front

Which graph shows a linear relationship?

Back

Graph C shows a linear relationship between x and y.

Front

What does a negative correlation indicate?

Back

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

Front

What does a positive correlation indicate?

Back

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

Front

What does 'no association' mean in a graph?

Back

'No association' means that there is no clear relationship between the two variables being plotted.

Front

How can you identify the line of best fit on a scatter plot?

Back

The line of best fit can be identified as the line that minimizes the distance between itself and all the points in the scatter plot.

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to summarize the relationship between two variables and make predictions based on that relationship.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables for a set of data, using dots to represent the values.