In the \(xy\)-plane shown, the shaded region consists of all points that lie above the graph of \(y = x^2- 4x\) and belo

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2016-01-24_1416.png
In the \(xy\)-plane shown, the shaded region consists of all points that lie above the graph of \(y = x^2- 4x\) and below the \(x\)-axis. Does the point \((a,b)\) (not shown) lie in the shaded region if \(b < 0?\)

(1) \(0 < a < 4\)

(2) \(a^2 - 4a < b\)

Answer: B

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