Evaluating Lines of Best Fit

Questions

1. MultiChoice

   Which of the following describes a POOR line of best fit?

2. MultiChoice

   Student A draws a line connecting only the first and last points of a scatter plot. Why might this be incorrect?

3. MultiChoice

   What is a 'residual' in linear modeling?

4. MultiChoice

   If a data point is located at (4, 10) and the trend line predicts (4, 8), what is the residual?

5. MultiChoice

   If a data point lies exactly on the line of best fit, its residual is:

6. MultiChoice

   A student fits line L1 and line L2 to the same scatter plot. How can they determine which line fits better?

7. MultiChoice

   If all actual data points lie directly on the line of best fit, what is true?

8. MultiChoice

   Why is a horizontal line a BAD fit for data showing a strong positive correlation?

9. MultiChoice

   When judging line fit visually, what should you look for regarding points above versus below the line?

10. MultiChoice

    A data point is at (3, 7). The line of best fit equation is y = 2x + 2. What is the residual for this point?

11. MultiChoice

    If the residual for a point is negative, where is the data point relative to the trend line?

12. MultiChoice

    If the residual for a point is positive, where is the data point relative to the trend line?