Write an equation for a function whose graph fits the given description.The graph of f(x) = x2 is vertically stretched by a factor of 3, and the resulting graph is reflected across the x-axis.
A. f(x) = 3(x - 3)x2
B. f(x) = -3x2
C. f(x) = (x - 3)2
D. f(x) = 3x2
Answer: B
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