Detailed description
Trapezoidal estimate. y = f(x) where f(x) = x squared + 1, parabola, 5 equal width trapezia between x = 0 and x = 5, with trapezia starting at x = 0, x = 1, x = 2, x = 3 and x = 4.
Integration
Trapezoidal estimate. y = f(x) where f(x) = x squared + 1, parabola, 5 equal width trapezia between x = 0 and x = 5, with trapezia starting at x = 0, x = 1, x = 2, x = 3 and x = 4.