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If K is a constant, which of the following equations best describes the parabola?

If K is a constant, which of the following equations best describes the parabola?
  • A.
    y = kx2
  • B.
    x = y2 – k
  • C.
    y = k – x2
  • D.
    x2 = y2 – k
  • 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