What is an example of the Lagrange interpolation formula?

Ans: There are a lot of Lagrange interpolation formula solved examples that you can find. Suppose, the given values are x = 0, x₀ = -2, x₁ = 3, x₂ = 3, x₃  = 7, y₀ = 5, y₁ = 7, y₂ = 11, y₃ = 34. When we apply Lagrange interpolation formula to this equation, what we get is y = 21/27 + 4/96 + -77/20 + 51/54. Solving this further we get y = 1087/180 as the final answer.