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Sophie Lakes Introduction For my maths coursework, I have been asked to investigate what affects the price of a used car. I have been given information on 100 cars. On each car I have details of its * Make (e.g. Ford) * Model (e.g. Fiesta) * Colour * Price when new * Current price * Age * Colour * Engine * Petrol Type * MPG * Mileage * History - Service? - Number of owners - Length of MOT * Tax (months) * Insurance group * Doors * Style * Central Locking * Seats * Gearbox * Air conditioning? * Airbags? In the information there are 26 different brands of car. Hypothesis The value of a car decreases exponentially with age By decreasing exponentially I mean that in a graph of a certain type of car, with age along one axis and its value along the other, a downward curve would be seen, for example: Plan The factor that I am first going to investigate, as I believe it to be the most important factor affecting the selling price of the...

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