Polygon ABCD will be dilated by a factor of 2 to produce polygon A′B′C′D′. The origin is the center of dilation. Which point will not represent a vertex on polygon A′B′C′D′ ?

Question

anonymous · Answer

@bibby  do you know the answer to this by any chance? 

A) (-2,-2)

B) (4,3)

C) (0,2)

D) (4,-2)

bibby · Answer

is there a diagram?

anonymous · Answer

yes hold on

anonymous · Answer

attachment

bibby · Answer

as I recall, dilation by a factor of a works like $(x,y)\longrightarrow (a*x,a*y)$
so if we dilated point A which is (-1,-1) by a factor of 2, we'd have $(-1*2,-1*2)=(-2,-2)$

anonymous · Answer

no it was wrong :/ im pretty sure its (4,3) I found that on some other website but I wasn't sure if that was right but  thank you for the help(:

bibby · Answer

I didn't say that was the answer... I'm giving you the tools to find the answer

bibby · Answer

they asked which one WASN'T in the new polygon. I just said (-2,-2) WAS in the new, dilated polygon

anonymous · Answer

ya I didn't read the question very well /.\

bibby · Answer

so dilate points B, C, and D and figure out which point doesn't belong

bibby · Answer

do you need another push?