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In the function above, if f(k) = 2, then which one of the fo

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In the function above, if f(k) = 2, then which one of the fo [#permalink] New post 14 May 2019, 08:30
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In the function above, if f(k) = 2, then which one of the following could be a value of k ?

(A) –1

(B) 0

(C) 0.5

(D) 2.5

(E) 4
[Reveal] Spoiler: OA

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Re: In the function above, if f(k) = 2, then which one of the fo [#permalink] New post 14 May 2019, 13:36
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Note that all GRE coordinate geometry figures can be assumed drawn to scale and that f(x) notation is interchangeable with the y-coordinate in the coordinate plane, so look for the possible x values when the y-coordinate = 2, since the problem states that f(k) = 2.

Looking at the figure, the possible x values when the line intersects y = 2 are either x = -1 or the approximate range that 2 ≤ x ≤ 3.

The only answer choice that fits these values is 2.5, so the correct choice is D.
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Re: In the function above, if f(k) = 2, then which one of the fo   [#permalink] 14 May 2019, 13:36
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