You are to reduce the size of a picture so the original is twice the size of the copy. The preimage is 8 in by 10 in. Using a matrix of coordinates of the preimage vertices, with one vertex (0, 0), what are the coordinates of the vertices of the image?

Question

anonymous · Answer

@whpalmer4

whpalmer4 · Answer

Sorry, I don't understand the matrix portion of this.  I'm sure it is straightforward, but I don't like to answer if I'm not confident that my answer is correct.  Maybe @jim_thompson knows what they are getting at here.

whpalmer4 · Answer

oops, @jim_thompson5910 never noticed that number before :-)

anonymous · Answer

Okay, thanks anyway!

jim_thompson5910 · Answer

It might help to first identity the corner points of the original picture

jim_thompson5910 · Answer

one is given to be (0,0), but what are the other three points?

anonymous · Answer

Would another point be (8,10)?

anonymous · Answer

@sourwing

anonymous · Answer

@phi

phi · Answer

The original  "pre image"  is 8 x 10
(I guess that is 8 inches wide and 10 inches tall)
if you put the lower left corner at (0,0)
you get this
|dw:1397752328629:dw|