Question 10 Answer & Explanation - SAT Advanced Math

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For what values of $x$ is the graph of $y = x^2$ above the line $y = 9$ ?

$x < -3$ or $x > 3$

$-3 < x < 3$

$x > 9$

$x > 3$

Correct Answer: A

Choice A is the correct answer.

"Above" means $>$ : $x^2 > 9$ .
Solve inequality: $|x| > 3$ .
Result: $x > 3$ or $x < -3$ .

Choice B is incorrect because that is where parabola is below line. Choice C is incorrect. Choice D is incorrect because it misses negative values.

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