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Solomon Press C1 COORDINATE GEOMETRY Answers - Worksheet D 1 a grad l = −2 2 a53 grad = 71 + − = 4 3 ∴ grad m = 1 2 y + 3 = ∴4 3 (x − 1) [4x − 3y − 13 = 0] y + 1 = 1 2 (x − 6) subtracting, 4yb − 4 = 0 2y + 2 = x − 6 y = 1 ∴ C (4, 1) x − 2y − 8 = 0 mid-point = 17 35 22 (, )+−+ = (4, 1) b x − 2(1 − 2x) − 8 = 0 C is the mid-point of AB∴
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