Two models R₁ and R₂ are given for revenue (in millions of dollars) for a corporation. Both models are estimates of revenues from 2020 through 2025, with t = 0 corresponding to 2020. Which model projects the greater revenue? How much more total revenue does that model project over the six-year period?

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R₁ = 2.98 +0.65t R₂2.98 +0.56t