You are examining the valuation metrics of two energy companies, EnergyCorp and PowerGen, in the renewable energy sector.

Requirements:

1. EnergyCorp has a market price per share of $80 and operating cash flow per share of $10 for the fiscal year 2023. PowerGen's market price per share is $90, and its operating cash flow per share is $12 during the same period.
2. Calculate the price-to-cash flow ratio for both companies.
3. Analyze which company appears to be more attractively valued relative to its cash flow.