UI Post-UTME Mathematics 2022 (Model questions) Question 13

Question 13

Coordinate Geometry

If line y = 5x + 3 is parallel to line y = kx + 5, estimate 2k + 1

  1. A.7
  2. B.14
  3. C.11
  4. D.9
Show the answer and explanation

Answer: C (11)

Explanation

Parallel lines have equal gradients, so k = 5 and 2k + 1 = 11.