Linear Regression

Front

What is Linear Regression?

Back

A statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

What does a positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What is the slope in a linear regression equation?

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.

Front

What does the y-intercept represent in a linear regression equation?

Back

The value of the dependent variable when the independent variable is zero.

Front

What does an r-value of 0.3 indicate?

Back

A weak positive correlation between the two variables.

Front

What does an r-value of -0.89 indicate?

Back

A strong negative correlation between the two variables.

Front

How do you interpret the slope of the equation y = 61.93x - 1.79?

Back

It means that for each additional hour of driving, the distance traveled increases by 61.93 miles.

Front

What is a scatter plot?

Back

A graphical representation of the relationship between two quantitative variables, showing individual data points.

Front

What is a trend line in a scatter plot?

Back

A line that best represents the data points in a scatter plot, used for making predictions.