How are the coordinates of the new point found if it is dilated with a scale factor of 3?

Question

anonymous · Answer

) Here θ = 270; so, cos(270) = 0 and sin(270) = -1
Thus, (x₁,y₁) = (x*0-y*-1, x*-1+y*0) = (y,-x) [It is equivalent to 90 deg rotation in clockwise]

anonymous · Answer

thanks heres a few more im just so bad at math How are the coordinates of the new point found if it is rotated 90° counterclockwise? How many degrees is that equivalent to if the rotation is clockwise?

anonymous · Answer

I don't quite understand @seashell 's reasoning.  What I believe one should do is find the angle of the point to the $x$-axis, and then find the point that is three times the distance away form the origin as the original point.

anonymous · Answer

:p well then ;)

anonymous · Answer

Dilation means to stretch outward...it's not a rotation.

anonymous · Answer

:p i gave you a medal ALRIGHT!;)

anonymous · Answer

Haha I know. ;-)  Just clarifying.

anonymous · Answer

:D