Skip to main content\(\newcommand{\R}{\mathbb{R}}
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An interactive three dimensional plot with axes labeled
\(x\text{,}\) \(y\text{,}\) and
\(z\text{.}\) A slider at the top of the figure allows the user to change the value of k and a checkbox allows a grid of vectors to be drawn along the surface. The checkbox is labeled “Show Gradient Vectors”. A sphere is drawn in blue with a radius depending the value of k that is selected by the user. The vectors drawn are perpendicular to the surface and point away from the origin.