Forecasting - How to use given numbers?

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Hi all - have a homework assignment involving forecasting.
- We're given transactions and revenue for four months in 2022 (Apr - Jul), and need to forecast those values for the 2023 fiscal year (Apr - Mar). In a new tab.
- We're also given a tab with the number of passengers who board a plane per month. 23-24 is a projection based on the decimals below, which are ratios of the total in O7.

I know how to use the Data --> Forecast Sheet tool, where you select both the date cells and the value cells, select the dates to forecast, and can create a new results tab with forecasted values. I also know about the FORECAST function.

I'm curious how I'd use the data in the "People Boarding Planes" tab to forecast the revenue and transaction data. And what would be the most efficient way to complete this problem?

Appreciate any help!