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ZX-8660917F0A2026年9月美国A卷 · 第 8 题
2026年9月美国A卷 · 原库模块 3 · Q8 参考答案
A scientist is determining the rate of heat absorption in a material by measuring its temperature at regular time intervals. The initial temperature of the material is recorded as 15 degrees Celsius (°C). The temperature of the material increases at a constant rate of 3°C every 7 minutes for the first 70 minutes after the initial temperature was recorded. Which equation best represents the temperature y, in °C, of the material x minutes after the initial temperature was recorded, where \( 0\le x\le70 \)?
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