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. It shows the trend of the data points.

Front

How do you determine the predicted value using the line of best fit?

Back

To determine the predicted value, you can substitute the x-value into the equation of the line of best fit.

Front

What does a positive slope in a line of best fit indicate?

Back

A positive slope indicates that as the x-value increases, the y-value also increases.

Front

What does a negative slope in a line of best fit indicate?

Back

A negative slope indicates that as the x-value increases, the y-value decreases.

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) measures 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 indicate?

Back

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

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

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

Back

The line of best fit can be visually identified as the line that minimizes the distance between itself and all the data points.

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 make predictions about future data points based on the existing data.

Front

What does it mean if a scatter plot shows an exponential trend?

Back

An exponential trend indicates that the rate of change increases or decreases rapidly, rather than at a constant rate.