Data Sufficiency in Coordinate Geometry. Here is an interesting GMAT data sufficiency question on intercepts and points of intersection of two perpendicular lines. A medium difficulty GMAT 650 to 700 level sample question. Data Sufficiency Question Line L is perpendicular to line K whose equation is 3y = 4x + 12; Lines L and K intersect at (p, q).Is p + q > 0? 1. x intercept … [Read more...] about Data Sufficiency | Coordinate Geometry : Quadrants

# Slopes

## Coordinate Geometry DS – Slope of Lines

Here is a data sufficiency question from Coordinate geometry. Is the slope 'm' of the line y = mx + c positive? 1. The x and y intercepts are both negative. 2. The line passes through the first quadrant.Correct Answer : Choice A. Statement 1 alone is sufficient.Explanatory AnswerPositive Sloping Lines : The x and y intercepts of the line are of opposite signs. If the x … [Read more...] about Coordinate Geometry DS – Slope of Lines

## GMAT DS : Geometry, Coordinate Geometry

Here is a data sufficiency question. It is a question on slopes of lines and tests basic concepts about lines in geometry and coordinate geometry.QuestionAre lines p (with slope m) and q (with slope n) perpendicular to each other?1. m + 2 = n2. m + n = 0Correct Answer: Choice C. BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER … [Read more...] about GMAT DS : Geometry, Coordinate Geometry