Let's define the variables:
- Let \( x \) be the number of days.
- Let \( y \) be the distance in miles.
From the information provided, we know that a dog runs 200 miles in 4 days. We can set up the relationship as follows:
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The rate of miles per day is calculated as: \[ \text{Rate} = \frac{200 \text{ miles}}{4 \text{ days}} = 50 \text{ miles/day} \]
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The equation relating \( y \) and \( x \) can therefore be written as: \[ y = 50x \]
Now, if we want to find the distance traveled in 14 days (where \( x = 14 \)), we can substitute \( x \) into the equation:
\[ y = 50(14) \] \[ y = 700 \]
So, the dog would run 700 miles in 14 days.