a Use rotation of axes to show that the following equation represents a parabola Write the equation in XY coordinates Use a rotation angle that satisfies 0 y 2 and that eliminates the xy term 2 2 x y 7x 9y X Find the XY and xy coordinates of the vertex and focus vertex focus x coordinates x y XY coordinates Your answer cannot be understood or graded More Information Find the equation of the directrix in XY and xy coordinates Y coordinates X xy coordinates x y x y