John runs a marathon (26.2 miles) in 4 hours. Determine how many miles he runs per hour if the proportional relationship is represented by 4y=26.2x

To find out how many miles John runs per hour, we can use the given equation \( 4y = 26.2x \).

Here, \( y \) represents the number of miles per hour, and \( x \) represents the number of hours.

Since John runs for 4 hours, we can substitute \( x = 4 \) into the equation:

\[ 4y = 26.2(4) \]

Calculating the right side:

\[ 4y = 104.8 \]

Now, we solve for \( y \):

\[ y = \frac{104.8}{4} = 26.2 \]

This calculation shows that in 4 hours, he runs 26.2 miles, confirming that running 1 hour would result in:

\[ \text{Miles per hour} = \frac{26.2 \text{ miles}}{4 \text{ hours}} = 6.55 \text{ mph} \]

So John runs at a speed of 6.55 mph.

The correct response is:

6.55 mph.