## The number of cases of flu is increasing by 10 every 3 days

### In this case, we can define a linear relationship to represent the number of flu cases over time

In this case, we can define a linear relationship to represent the number of flu cases over time. Let’s break down the given information and use it to formulate an equation.

We are told that the number of flu cases is increasing by 10 every 3 days. This means that for every 3-day interval, the number of flu cases increases by 10. We can let “c” represent the number of flu cases and “d” represent the number of 3-day intervals.

From this, we can create an equation:

c = 10d

In this equation, “c” represents the number of flu cases, and “d” represents the number of 3-day intervals. This equation shows that the number of flu cases is directly proportional to the number of 3-day intervals.

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