A quadratic equation has been transformed using the rotation equations x = 0.8u - 0.6v and y = 0.6u + 0.8v.
Convert the given point from (u, v) coordinates back to (x, y) coordinates.
-parabola focus (-1, 9)
A) (-8, 4.8)
B) (6.6, -6.2)
C) (4.6, -7.8)
D) (-6.2, 6.6)

Question

A quadratic equation has been transformed using the rotation equations x = 0.8u - 0.6v and y = 0.6u + 0.8v. 
Convert the given point from (u, v) coordinates back to (x, y) coordinates.
-parabola focus (-1, 9)
A) (-8, 4.8)
B) (6.6, -6.2)
C) (4.6, -7.8)
D) (-6.2, 6.6)

Quizplus · Accepted Answer

Using the rotation equations, substitute u = -1 and v = 9 into x = 0.8u - 0.6v and y = 0.6u + 0.8v to find x and y.

A Quadratic Equation Has Been Transformed Using the Rotation Equations