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Data Visualizationhard
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A heat map represents the function h(x,y)=x2+2y2h(x, y) = x^2 + 2y^2h(x,y)=x2+2y2. If the color scale maps values v∈[0,10]v \in [0, 10]v∈[0,10] to a gradient, what is the shape of the boundary where the color intensity is constant at v=4v=4v=4?