Answer: 1 inch to 6 inches.
Explanation:
It is given that an image of a book shown on a website is 1.5 inches wide and 3 inches tall on a computer monitor.
The actual width of the book = 9 inches
We need to find the scale that is used for the image.
It means 1 inch of image represents 6 inches.
Therefore, the required scale is 1 inch = 6 inches or 1 inch to 6 inches .