14. Least Squares and Applications

Data Fitting And Regression Lines — Quiz

Test your understanding of data fitting and regression lines with 5 practice questions.

Practice Questions

Question 1

What is the main goal of a regression line in data fitting?

Question 2

What is a residual in a regression problem?

Question 3

In least squares, which quantity is minimized?

Question 4

If a scatter plot shows points clustered closely around a straight line, what does that usually indicate?

Question 5

For the line $y = 2x + 1$, what is the predicted value when $x = 3$?