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

A.
y = kx^{2} 
B.
x = y^{2} – k 
C.
y = k – x^{2} 
D.
x^{2} = y^{2} – k 
E.
y = (k – x)^{2}
Correct Answer: Option B
Explanation
The parabola is best described by the equation x = y^{2} – 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