Dr. J's Maths.com
Where the techniques of Maths
are explained in simple terms.

Linear models - Direct variation.
Test Yourself 1.


Direct variation to the item.  


Direct variation to the square of the item.

Daisy is travelling in the Northern Territory and she sees a nice scarf with an aboriginal print she likes very much.

The cost (C) of the scarf varies directly with the square of the length (L) of the scarf.

A scarf of length 50 cm costs $8. How much does a scarf of length 135 mm cost?