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10 cards from this deck
It shows trends and helps predict unknown values.
Draw a straight line that balances points above and below.
It should pass through the mean point (x̄, ȳ).
To cover the full range of data for better predictions.
Both variables increase together; line slopes upward.
Use: x̄ = Σfx / Σf.
Find x, draw up to the line, read the corresponding y.
Forcing the line through (0,0) when not needed.
One variable increases while the other decreases.
Plot all data points carefully on the scatter diagram.
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