Line of Best Fit

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 scatter plot, minimizing the distance between the line and all the points.

Front

What does a correlation coefficient (r) indicate?

Back

The correlation coefficient (r) indicates the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What does an r value of -0.6 suggest about the data?

Back

An r value of -0.6 suggests a moderate negative correlation between the two variables.

Front

What does a positive trend in a graph indicate?

Back

A positive trend indicates that as one variable increases, the other variable also tends to increase.

Front

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

Back

The purpose of the line of best fit is to provide a visual representation of the relationship between variables and to make predictions.

Front

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

Back

A line is an accurate line of best fit if it closely follows the pattern of the data points and minimizes the residuals.

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.

Front

What does it mean if there is 'no association' in a graph?

Back

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

Front

What factors can affect the accuracy of a line of best fit?

Back

Factors include outliers, the distribution of data points, and the choice of the model used for fitting.

Front

What is the difference between positive and negative correlation?

Back

Positive correlation means that as one variable increases, the other also increases, while negative correlation means that as one variable increases, the other decreases.