Long description: block6-fig5(new)

Alt text: A graph showing a smooth, increasing, and concave up curve passing through the origin.

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The image displays a two-dimensional Cartesian coordinate system with a horizontal x-axis and a vertical y-axis.
A single curve is plotted on the graph, passing through the point (0, 0).
The curve is smooth and appears to be monotonically increasing across the visible domain.
The shape of the curve suggests that its rate of increase is constantly growing, indicating positive second derivatives and a concave up curvature.
As the x-values increase to the right, the y-values increase steadily and rapidly.
As the x-values decrease to the left, the y-values also increase, approaching a minimum value that appears to be below the visible y-axis range.