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, 1998

Geometry Difficulty 1.0 Junior Prove it Canada

The vertex of $y=(x-1)^2+b$ has coordinates $(1,3)$ . What is the $y$ -intercept of this parabola?

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.