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

.(1 point)
Responses

7 mph
7 mph

0.15 mph
0.15 mph

6.55 mph
6.55 mph

104.8 mph

1 answer

To find out how many miles John runs per hour, we need to rearrange the given equation \(4y = 26.2x\) to express \(y\) in terms of \(x\):

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

Here, \(y\) represents the miles John runs in a specific time period (in hours), and \(x\) represents the time in hours. Since John runs for 4 hours (which means \(x = 4\)), we can substitute 4 for \(x\):

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

Now to find miles per hour, we see how many miles he runs in 1 hour:

\[ y = \frac{26.2}{4} = 6.55 \text{ mph} \]

Thus, John runs at a speed of 6.55 miles per hour.

The correct response is 6.55 mph.