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Mary purchased a new car. The purchase price was $12000$ euros and the value of the car depreciates by $12\mathrm{\%}$ per year. Suzy purchased a new car at the same time as Mary and the purchase price was $14500$ euros. The depreciation rate for Suzy's car is $15\mathrm{\%}$. Let $p$ be the price of the car in thousands euros and $t$ be the age of the car in years. In the diagram below, determine the color of the graph that shows relationship between the price of Mary's car and its age. (Note: The answers include not only the color of the graph but also the relevant function equation.)