Answer: 1 inch to 6 inches.
Step-by-step 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.
[tex]\text{Scale}=\dfrac{\text{Width of the image of book}}{\text{actual width of the book }}[/tex]
[tex]\text{Scale}=\dfrac{1.5}{9}[/tex]
[tex]\text{Scale}=\dfrac{15}{90}[/tex]
[tex]\text{Scale}=\dfrac{1}{6}[/tex]
It means 1 inch of image represents 6 inches.
Therefore, the required scale is 1 inch = 6 inches or 1 inch to 6 inches .