Can y’all help me for this test I don’t get it

Answer:
$2.25 per ganola Bar
Step-by-step explanation:
Cost of 4 Bars = $ 9
Cost of 1 Bar = 9/4=2.25
Answer:
The constant of proportionally is 2.25$
Step-by-step explanation:
All you have to do is 9/4=2.25$
Hope this helps!!