Final answer:
To find the value of r, use the formula x = rt. Plug in the given values and solve for r. The value of r is 18 miles per day.
Step-by-step explanation:
To find the value of r, we can use the formula x = rt, where x is the distance traveled, r is the rate (or speed), and t is the time.
Given that d (distance) is 162 miles and t (time) is 9 days, we can plug these values into the formula:
x = rt
162 = r(9)
Dividing both sides by 9, we get:
18 = r
Therefore, the value of r is 18 miles per day.