Scatter plots, trends and predictions

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Learn it A scatter plot shows pairs of data. If y tends to rise as x rises, the trend is positive; if it falls, negative; if there is no pattern, no correlation. A line of best fit can be used to predict.

Example: Line of best fit $y = 4x + 50$. Predict y for x = 8.

$y = 4(8) + 50$.
$y = 82$.

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