Line of Best Fit Flashcard

Front

What is the correlation between study time and test grades?

Back

Positive correlation means that as study time increases, test grades also tend to increase.

Front

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

Back

The line of best fit represents the trend of the data points, showing the overall direction of the relationship between the variables.

Front

What is a line of best fit used for?

Back

To make predictions about one variable based on the value of another variable.

Front

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

Back

It may not accurately represent the trend of the data, and thus may not be a line of best fit.

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.

Front

What does a positive correlation look like on a scatter plot?

Back

A positive correlation appears as an upward trend, where data points rise from left to right.

Front

What does a negative correlation look like on a scatter plot?

Back

A negative correlation appears as a downward trend, where data points fall from left to right.

Front

What is the purpose of the line of best fit in data analysis?

Back

To summarize the relationship between variables and to make predictions based on that relationship.

Front

How can you determine if a line is a line of best fit?

Back

A line is a line of best fit if it minimizes the distance between itself and all the data points.

Front

What does it mean if there is no correlation between two variables?

Back

It means that changes in one variable do not affect the other variable.