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On a coordinate map of a fort, a flag is at (a, b) with a = -3 and a + b = 1.
Find b and state the quadrant of the flag.

Class 9The Cartesian PlaneCoordinate Geometry
  • Ab = 4, second quadrant
  • Bb = -4, third quadrant
  • Cb = 4, first quadrant
  • Db = -2, fourth quadrant

Step-by-Step Solution

From a + b = 1 with a = -3: -3 + b = 1, so b = 4. The point (-3, 4) has signs (-, +), the second quadrant.
Answer: A) b = 4, second quadrant

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