To determine the coordinates of B', we first need to understand how the translation vector applies to rectangle ABCD, given that the coordinates of point A' are (-1, 1).
Let’s denote the original coordinates of point A as (x_A, y_A) and the translation vector as (t_x, t_y). The relationship after applying the translation is:
\[ A' = (x_A + t_x, y_A + t_y) \]
Since we know A' is (-1, 1), we can write:
\[ -1 = x_A + t_x \]
\[ 1 = y_A + t_y \]
From here, we can't determine x_A and y_A without more information about the translation vector or the position of A. We need to identify the original coordinates of B.
If we know the coordinates of A (x_A, y_A) and the shape of the rectangle, we can find B by using the rectangle's properties (e.g., the vertices of a rectangle are clearly defined around the origin, or if we assume A is one of the corners).
Assuming some standard positioning, if A is at the bottom-left of the rectangle:
- B could be to the right of A, at (x_A + w, y_A), where w is the width of the rectangle.
- But since we don't have information about the size of the rectangle or the translation itself, we proceed under the simplest assumption that it translates uniformly by the same vector.
If we believe B originally is straightforwardly to the right of A (say at a width of 4 units), then we could anticipate:
\[ B = (x_A + 4, y_A) \]
Then under the translation: \[ B' = (x_A + 4 + t_x, y_A + t_y) = (B_x + t_x, B_y + t_y) \]
Using the previous equations, we can also express these coordinates via the determined t_x and t_y:
Given the possible answers, we can check:
- The point A' as scientific directly from a rectangle's vertices lead us to evaluate the available options, knowing A globally moves.
Check the possible options against transformations given:
- For (3, 8) - too distant from (-1, 1)
- (3, 1) - plausible distance but opposite A’s directionality
- (-1, 6) - also seems too far
- (2, 1) - most viable given proximity.
Assuming uniform translate symmetry, and that this being a rectangle shape aligns closely, then:
Coordinate of B' = (2, 1) makes the most sense given the context.
Thus, the most likely coordinates of B' are:
(2, 1)