test review help

Question

Pentagon PENTA has coordinates P(0,0), E (4,4), N (8,4), T ( 8,-4), and A (4,-4) and is dilated at the origin with a scale factor of . 

Select all that are coordinates of P’E’N’T’A?

0,0)

(3,3)

(-3,3)

(6,3)

(6,-3)

(3,-3)

Answer 1

Your jpeg figures did not post correctly and we can't se them. But, if you dilate any figure by a scale factor of k about the origin, the rule is:

(x,y) ------> (kx,ky)

So a point (-1,3) dilated by k = 2 about the origin would be:

(-1,3) -----> (2·(-1),2·3) = (-2,6)