Interpret slope and intercept of a linear model in the data context.
Identify the units of the slope and intercept in a linear model from context
Problem
For a model in this context, what are the units of the slope and the intercept: cost in dollars predicted from years?
Big Picture
What this problem is really about
Dimensional consistency gives a reliable shortcut for parameter units. Because slope multiplies the input to produce an output change, its units must be output units divided by input units; the intercept is already an output value, so it carries only the output’s units.
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