exam Maths Puzzle Numerical Ability

How can I determine the correct half-plane boundry line graphed for this linear inequality. y>3?

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exam Other Question

A plane can travel 400 miles against the wind in the same time that it can travel 500 miles with the wind. If the speed of wind was 10 miles per hour. Find the speed of the plane in still air. rationalizing the denominator. Simplify the expression. Square root of 5/15.