Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §3.3 Second Derivatives: Bending and Acceleration, #1 · Calculus · Curve sketching
A graph that is concave upward is inaccurately said to "hold water."…
A graph that is concave upward is inaccurately said to "hold water." Sketch a graph with that would not hold water.
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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §3.3 Second Derivatives: Bending and Acceleration, #1
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