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, showing the trend of the data points.

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

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

Back

If there is no correlation, it means that there is no predictable relationship between the two variables.

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 on the scatter plot.

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 one variable based on the value of another variable.

Front

What is the formula for calculating the slope of the line of best fit?

Back

The slope (m) of the line of best fit can be calculated using the formula m = (NΣxy - ΣxΣy) / (NΣx^2 - (Σx)^2), where N is the number of data points.

Front

What does the y-intercept of the line of best fit represent?

Back

The y-intercept represents the expected value of the dependent variable when the independent variable is zero.

Front

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

Back

To determine the expected value, substitute the independent variable's value into the equation of the line of best fit.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables as points in a Cartesian coordinate system.