A rectangle is shown on a coordinate plane with vertices A(−4, 8), B(1, 8), C(1,−1), and D(−4,−1). What are the dimensions of the rectangle?

The horizontal side length is the difference between the x-coordinates: 1 − (−4) = 5 units. The vertical side length is the difference between the y-coordinates: 8 − (−1) = 9 units. Therefore, the rectangle’s base is 5 units and its height is 9 units, which is choice B.

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