Geometry:
the vertices of triangle abc are a(0,9), b(-9,-9), c(9,-9) find the scale factor if the image of abc has vertices a'(3,10),b'(-1,2),c'(7,2)

  4/9

Step-by-step explanation:

The easiest segment to work with is BC, since the y-values are the same for coordinates B and C and for B' and C'.

The length of BC = 9 -(-9) = 18.

The length of B'C' = 7 -(-1) = 8.

The scale factor is B'C'/BC = 8/18 = 4/9.

it would be:

c.parallelogram.