To find the last corner of Christy's rectangular flower garden, we first identify the given points:
- Point A: (1, 1)
- Point B: (4, 1)
- Point C: (4, 5)
These points form three corners of a rectangle. To find the fourth corner (let's denote it as point D), we note that in a rectangle, opposite corners share the same y-coordinates or x-coordinates.
The coordinates of the existing points indicate:
- Points A and B share the same y-coordinate (y = 1).
- Points B and C share the same x-coordinate (x = 4).
Thus, to find point D, we look for the coordinates which will share properties with one of the existing points. The fourth corner must be at the same x-coordinate as point A (x = 1) and the same y-coordinate as point C (y = 5).
This gives us the coordinates for point D:
Point D: (1, 5)
Therefore, Christy should place the last corner of her rectangular garden at (1, 5).