Difference in base price — $200–$125=$75
Difference in hourly charge — $18–$12=$5
Number of hours for which computer repair shop will cost the same = 75/5
=15 Hours
The scale factor is the number u multiply by the first image to get to the second image.
so 3 times what = 4
3x = 4
x = 4/3 (or 1 1/3) <== this is ur scale factor
