Answer: 1 inch is to 9 miles as 9 inches is to 81 miles
Explanation:
The relationship "1 inch is to 9 miles" can be represented as a ratio:
1 inch / 9 miles
Now, if you want to find out how many inches are equivalent to 81 miles in the same ratio, you can set up a proportion:
(1 inch / 9 miles) = (x inches / 81 miles)
To solve for x (the number of inches), you can cross-multiply and then divide:
1 inch * 81 miles = 9 miles * x inches
81 inches = 9x
Now, divide both sides by 9 to isolate x:
x = 81 inches / 9
x = 9 inches
So, 1 inch is to 9 miles as 9 inches is to 81 miles.