Question

Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."

DO, K = (5, 0) (10, 0)
The dilation an expansion.
true or false

Answer 1

The dilation constant K with origin (0,0) can be determined by
x'/x or y'/y
where (x,y) is the original position, and (x',y') is the image (dilated position).

In this case, since both y' and y are zero, only k=x'/x applies.

Answer 2

Idk