Final answer:
To find James' daily walking rate, calculate his average speed for each day. The equation representing James' daily walking rate is speed = 7 miles per hour.
Step-by-step explanation:
To find James' daily walking rate, we need to calculate his average speed for each day. Average speed is calculated by dividing the total distance traveled by the total time taken.
On Monday, James walked 3.5 miles in half an hour. Therefore, his average speed was 3.5 miles / 0.5 hours = 7 miles per hour.
On Tuesday, James walked 28 miles in 4 hours. Therefore, his average speed was 28 miles / 4 hours = 7 miles per hour.
On Friday, James walked 56 miles in 8 hours. Therefore, his average speed was 56 miles / 8 hours = 7 miles per hour.
Since James' average speed was the same each day, the equation that represents his daily walking rate is: speed = 7 miles per hour.