Detailed description
y = f(x) where f(x) = x squared + 1, parabola, 5 equal width rectangles between x = 0 and x = 5, with height of each rectangle determined by left value of x starting at x = 0.
Integration
y = f(x) where f(x) = x squared + 1, parabola, 5 equal width rectangles between x = 0 and x = 5, with height of each rectangle determined by left value of x starting at x = 0.