Which of the following expressions will give the area of the region bounded by the curve $y = x^2$ and the line $y = 16$?
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If integrated along the $x$-axis, the area would be $\int_{-4}^{4} (16 - x^2) \, dx = 2 \int_{0}^{4} (16 - x^2) \, dx$. Always verify whether the options integrate with respect to $x$ or $y$ to choose the matching formulation.