Fit a linear function to data when a scatter plot suggests a linear association.
Interpret slope in context
Problem
Interpret slope \(4\) for a fitted model that predicts cost \(C\) in dollars from ticket count \(t\).
Big Picture
What this problem is really about
Units turn a slope from a number into a statement. Read it as output units per one input unit, let its sign tell whether the predicted output rises or falls, and keep it distinct from the intercept, which describes the prediction at zero input.
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