Answer: I think b
Step-by-step explanation:
Step-by-step explanation:

For any direct variation, the equation is of the form y = kx, where k is the constant of proportionality.
Given the equation: f = 2.5w
The constant of proportionality is 2.5.
This means that the ration of the cups of flour to the cups of water used in the recipe is 2.5
All we have to do is first, add 5 Hours to 9:38. This takes us so 2:38 PM. Then we add the 18 minutes, giving us 2:56 PM. The ending time is 2:38 PM.