If the point (1, 3) is on the graph of y = f(x), then what is the corresponding point on the graph of y = −2f(x)?

The point (1, 3) means f(1) = 3. In y = −2f(x), the x-coordinate stays 1 while the y-value is multiplied by −2, so the new y-value is −2 × 3 = −6. The corresponding point is (1, −6), choice B.

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