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KwickClips Artificial Intelligence · 37 sec · free

What is the error?

Short answer. The gap from a point to the line.

Which line wins?

The one with the smallest squared errors.

Best-fit line

Line: y = m x + c
Error: point to line gap
Least squares: smallest total

Remember

Smallest squared errors win

Many lines pass near the points. Which one is best? Best fit means least error. The line is y equals m x plus c. Error is the gap from a point to the line. Least squares picks the smallest total. The smallest squared errors win.

This clip is from the full lesson: Regression: Correlation and Linear Regression — 7 minutes, with the tables, the quick answers and the whole lesson in text.

Useful for: CBSE Class 10 Artificial Intelligence (417), CBSE Class 11 Artificial Intelligence (843), CBSE Class 12 Artificial Intelligence (843)

More KwickClips from this lesson

Table of Pearson r values: +1 perfect rise, 0 no link, -1 perfect fall.Can r be 1.5?41 secPython code: m, c = 9.6, 41.0; x = 2.5; print(m * x + c) outputs 65.0.What is the prediction for 2.5 hours?36 secTable: regression gives a number, classification gives a category.Price of a used scooter?40 sec
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