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Algebra Difficulty 1.0 Junior Prove it Canada

A line with a slope of $3$ passes through the points $(1, 0)$ and $(5, c)$ . What is the value of $c$ ?

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

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.