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09 Oct 2018, 01:31
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
77% (00:52) correct
23%
(00:58)
wrong
based on 220
sessions
History
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Time
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Not Attempted Yet
Which of the following could be the equation of the figure above?
(A) \(y = x - 3\)
(B) \(y = 2x^2 - x\)
(C) \(y = x^2 - 3\)
(D) \(y = x^2 + 3\)
(E) \(y = x^3 - 3\)
Attachment:
Capture (2).JPG [ 18.47 KiB | Viewed 8437 times ]
09 Oct 2018, 12:33
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The graph is a upward parabola with negative intercept.
Only possible answer is C
Only possible answer is C
12 Oct 2018, 20:37
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Bunuel
a) Eliminate options A and E straightaway as they don't belong to parabola family of equations.
b) The given figure is centered or symmetrical about y-axis. Hence the parabola mustn't posses 'x' terms. So, eliminate option (B)
c) The vertex is on the negative y-axis. So, eliminate option (D).
Now, we are left with option (C), \(y=x^2-3\), which is in the standard form \(y=(x-0)^2+(-3)\) (Opens upward with y-intercept '-3' and centered on the y-axis)
Ans. (C)
