As shown in the figure, AB is a fixed length line segment, the center O is the midpoint of AB, AE and BF are tangent points, e and F are tangent points, satisfying AE = BF. Take point G on EF, and point G is the extension line of tangent intersection AE and BF at points D and C. when point G moves, let ad = y, BC = x, then the functional relationship between Y and X is () A. Positive proportion function y = KX (k is constant, K ≠ 0, X ＞ 0) B. primary function y = KX + B (k, B is constant, KB ≠ 0, X ＞ 0) C. inverse proportion function y = KX (k is constant, K ≠ 0, X ＞ 0) d. quadratic function y = AX2 + BX + C (a, B, C is constant, a ≠ 0, X ＞ 0)

As shown in the figure, AB is a fixed length line segment, the center O is the midpoint of AB, AE and BF are tangent points, e and F are tangent points, satisfying AE = BF. Take point G on EF, and point G is the extension line of tangent intersection AE and BF at points D and C. when point G moves, let ad = y, BC = x, then the functional relationship between Y and X is () A. Positive proportion function y = KX (k is constant, K ≠ 0, X ＞ 0) B. primary function y = KX + B (k, B is constant, KB ≠ 0, X ＞ 0) C. inverse proportion function y = KX (k is constant, K ≠ 0, X ＞ 0) d. quadratic function y = AX2 + BX + C (a, B, C is constant, a ≠ 0, X ＞ 0)

Connect OEO, of, OD, OC, OQ, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\oqf = ∠ BQ O. Qoo, according to the tangent length theorem, according to the tangent length theorem, according to the tangent length theorem, according to the tangent length theorem, we can get: od equal share \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\14ab2is the fixed value Let k = 14ab2 and y = KX, then the function relation between Y and X is inverse proportion function y = KX (k is constant, K ≠ 0, X ＞ 0)