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WAEC Mathematics 2015 Question 38

Question 38

Inequalities

Illustrate graphically, the solution of y/2 + 1/8 > 5y/8.

Diagram for this question
  1. A.Number line −3 to 4: open circle at 1, arrow to the left
  2. B.Number line −3 to 4: open circle at 1, arrow to the right
  3. C.Number line −1 to 7: open circle at 5, arrow to the left
  4. D.Number line −1 to 7: open circle at 5, arrow to the right
Show the answer and explanation

Answer: A (Number line −3 to 4: open circle at 1, arrow to the left)

Explanation

Multiply by 8: 4y + 1 > 5y, so y < 1: an open circle at 1 with the arrow pointing left.