Problem-Solving and Data AnalysisEasySlope of a line of best fit as a rate
Problem-Solving and Data Analysis practice question
A line of best fit for a scatterplot has a slope of 3. According to the line, when x increases by 1, by how much does the predicted value of y increase?
Answer: 3
The slope is the change in y for each 1-unit change in x.
Common wrong answers
- If you answered 1
- 1 is the change in x.
- If you answered 4
- 4 adds the slope and the change in x.
- If you answered 1/3
- 1/3 inverts the slope.
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