Basketball Backboard

FIG. 1 is a front, top, left side perspective view of a basketball backboard, showing my new design; FIG. 2 is a rear, top, right side perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; and, FIG. 9 is a perspective view thereof, shown in an environment of use. The broken lines in the drawings are for the purpose of illustrating portions of the basketball backboard that form no part of the claimed design. The broken lines showing a basketball stand in FIG. 9 are for the purpose of illustrating environmental subject matter and form no part of the claimed design.