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IMAS 2021–2022 Junior — Round 1 Question 1

IMAS · IMAS 2021–2022 Junior — Round 1

Question 1

The equation $n=456-3T$ is used to define the relationship between the number of hot chocolate cups $n$ sold per day in a coffee shop and the average daily temperature $T$, in degrees Celsius. According to the model, what does the number “3” mean in the equation?
  1. For every increase of $3^\circ\mathrm{C}$, one more cup of hot chocolate will be sold;
  2. For every decrease of $3^\circ\mathrm{C}$, one more cup of hot chocolate will be sold;
  3. For every increase of $1^\circ\mathrm{C}$, 3 more cups of hot chocolate will be sold;
  4. For every decrease of $1^\circ\mathrm{C}$, 3 more cups of hot chocolate will be sold;
  5. For every decrease of $1^\circ\mathrm{C}$, 3 times of cups of hot chocolate will be sold.