Linear models - Direct variation.
Test Yourself 1.
| Direct variation to the item. | |
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| 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? |