Mathematics
JAMB 1982
If K is a constant, which of the following equations best describes the parabola?
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A.
y = kx2
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B.
x = y2 - k
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C.
y = k - x2
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D.
x2 = y2 - k
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E.
y = (k - x)2
Correct Answer: Option B
Explanation
The parabola is best described by the equation x = y2 - k because all other equations do not give the equation of the parabola in this position. C for example is the equation of a hyperbola facing downwards. D is the equation of a hyperbola A and E are equations of parabola facing upwards
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