Line of Best Fit

Front

What is the definition of 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 trend of the data points.

Front

What does correlation measure in statistics?

Back

Correlation measures the strength and direction of a linear relationship between two quantitative variables.

Front

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

Back

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

How do you determine the slope of a line of best fit?

Back

The slope of a line of best fit can be determined by calculating the change in y over the change in x (rise over run) between two points on the line.

Front

What is the purpose of a scatter plot?

Back

A scatter plot is used to visually display the relationship between two quantitative variables, helping to identify trends, patterns, or correlations.

Front

What is the significance of the y-intercept in a line of best fit?

Back

The y-intercept is the value of y when x is zero, indicating the starting point of the line on the y-axis.

Front

What is the formula for calculating correlation coefficient (r)?

Back

Front

What does it mean if the correlation coefficient is close to 1?

Back

If the correlation coefficient is close to 1, it indicates a strong positive linear relationship between the two variables.