Answer:
The scale factor represents the ratio between the measurements on the drawing and the actual measurements of the swimming pool.
Since the scale is 9 inches = 4 feet, we can simplify it by dividing both sides by 3. This gives us a scale of 3 inches = 1.33 feet, or approximately 1.33/1 feet.
To express this as a fraction, we can simplify the decimal by multiplying both the numerator and the denominator by 100, which gives us 133/100.
So the scale factor of the drawing is 133/100.