Question

Pentagon ABCDE is dilated according to the rule
DO,3(x,y) to create the image pentagon A'B'C'D'E', which is shown on the graph.

On a coordinate plane, pentagon A prime B prime C prime D prime E prime has points (negative 3, 6), (negative 0.5, 8), (2, 6), (1, 3), and (negative 2, 3).

What are the coordinates of point A of the pre-image?

(-1, 1)
(-1, 2)
(-9, 6)
(-9, 18)

Answer 1

Dilation D_{O,3} multiplies coordinates by 3, so to get the preimage divide A' by 3: A = (-3/3, 6/3) = (-1, 2). Answer: (-1, 2).