Final answer:
The inequality modeling the fundraising goal for selling granola bars and bottles of water, with the revenue being at least $150, is 1.25x + 0.50y ≥ 150.
Step-by-step explanation:
The student is asking for an inequality that models the fundraising scenario. To find this inequality, we need to calculate the total revenue from selling x granola bars at $1.25 each and y bottles of water at $0.50 each, and make sure that the revenue is at least $150. So, the inequality that models the situation is:
1.25x + 0.50y ≥ 150
This inequality ensures that the revenue from selling x granola bars and y bottles of water must be equal to or greater than $150 to meet the fundraiser's goal.