Revision sheet

All the summary cards of the chapter on one page. Print it, or save it as a PDF from the print window.

Proportional relationships

$y = kx$ , $k = y \div x$ ; the graph passes through $(0, 0)$ .

Watch out: scale by multiplying, not by adding.

Tables, graphs, equations

Constant ratio; line through the origin; $(1, k)$ ; $y = kx$ .

Watch out: a constant difference is not a constant ratio.

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