Answer:
Triangle ABC is dilated by a scale factor of 1.5
Step-by-step explanation:
The general rule for the dilation about the origin with a factor of k is

You are given two triangles ABC and A'B'C'.
In triangle ABC:
From the diagram, in triangle A'B'C':
As you can see
So, triangle ABC is dilated by a scale factor of 
Answer:
(x, y) → (1.5x, 1.5y)
Step-by-step explanation:
Each of the image coordinates is 1.5 times the corresponding pre-image coordinate. The transformation is a dilation by a factor of 1.5 about the origin.
Some authors use a notation like D(1.5,O) to indicate the transformation. I like the one shown above, or ...
(x, y) → 1.5(x, y)
i got:
n = -1 + 3/x
x = 3/n + 1
not sure if this helps but i hope it does somehow