Use the following information to answer questions 37-39.
A parabola with equation 
is graphed in the standard (x, y) coordinate plane below. Point Z(p, q) lies on the parabola.
39. Suppose that the parabola is rotated clockwise(⟳) by 90° about the origin. Which of the following is an equation for the parabola that results from this rotation?
Your Answer is
Correct Answer is B
Explanation
If the one-dimensional quadratic function with an upward opening is rotated 90 degrees clockwise, the positive semi-axis of the y-axis can be regarded as the original x-axis, then the original y=ax2 can be written do x=ay2