To determine how many miles John runs per hour, we can use the equation given:
\[ 4y = 26.2x \]
Here, \( x \) represents the number of hours and \( y \) represents the miles ran per hour.
Since John runs for 4 hours (so \( x = 4 \)), we can substitute this into the equation to solve for \( y \):
\[ 4y = 26.2 \times 4 \]
Calculating that:
\[ 4y = 104.8 \]
Now, divide both sides by 4 to solve for \( y \):
\[ y = \frac{104.8}{4} = 26.2 \]
Now we find out how many miles he runs in one hour:
\[ y = 6.55 \text{ mph} \]
Thus, the correct response is:
6.55 mph