Final answer:
The equation representing the cost relationship between Almost Pinejuice and pineapple juice is y = 0.25p, where y is the cost of Almost Pinejuice and p is the cost of pineapple juice.
Step-by-step explanation:
The equation that represents the statement "Almost Pinejuice (y) cost 1/4 as much as pineapple juice (p)" is y = ⅓p or y = 0.25p.
In this equation, p represents the cost of pineapple juice, and y represents the cost of Almost Pinejuice. Because Almost Pinejuice costs a quarter of what pineapple juice does, we multiply the cost of pineapple juice by 1/4 (or 0.25) to find the cost of Almost Pinejuice.