Interpret slope and intercept of a linear model in the data context.
Interpret the slope of a linear model as predicted change per unit input
Problem
Interpret a slope of \(-\$500~\text{per}~\text{year}\) for a fitted car-value model.
Big Picture
What this problem is really about
A negative slope does not make the predicted output itself negative; it describes the direction of change. Separate sign from magnitude, attach output units per input unit, and translate a one-unit increase in the input into a decrease of the stated magnitude in the model’s prediction.
Inside Gozunta
Turn the preview into practice.
More than a preview
Gozunta lets you study this problem—and more than 10,000 others.
Create targeted learning sessions, use hints, check your answer, read the walkthrough, watch the video, print the work, and track your progress.
