Problem-Solving and Data AnalysisMediumy-intercept of a line through data points
Problem-Solving and Data Analysis practice question
The points (2, 3), (4, 7), (6, 11), and (8, 15) all lie on a single line in the xy-plane. What is the y-coordinate of the point where this line crosses the y-axis?
Answer: -1
The slope is 2, so y = 2x − 1, which gives −1 at x = 0.
Common wrong answers
- If you answered 1
- 1 has the sign wrong.
- If you answered 2
- 2 is the slope.
- If you answered 3
- 3 is the y-value at x = 2, not at x = 0.
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