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 is B
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