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1.1 Rectangular Coordinates

1.1 Rectangular Coordinates. Objective. Plot points in the Cartesian plane. Identify the four quadrants. The Cartesian Plane. The Cartesian plane is formed by using two real number lines intersecting at right angles. The horizontal real number line is the x-axis .

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1.1 Rectangular Coordinates

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  1. 1.1 Rectangular Coordinates

  2. Objective • Plot points in the Cartesian plane. • Identify the four quadrants.

  3. The Cartesian Plane • The Cartesian plane is formed by using two real number lines intersecting at right angles.

  4. The horizontal real number line is • the x-axis. • The vertical real number line is • the y-axis. • The point of intersection of these two axes • is the origin. • The two axes divide the plane into four parts called • Quadrants.

  5. II I III IV

  6. In the first quadrant, x > 0 and y > 0, xy > 0. • In the second quadrant, x < 0 and y > 0, xy < 0. In the third quadrant, x < 0 and y < 0, xy > 0. In the fourth quadrant, x > 0 and y < 0, xy < 0.

  7. On the coordinate plane below, graph A(0, 2), B(4, -3), C(-2, -1), D(2, 3), E(2, 0) and F(-5, 3)

  8. Determine the quadrants in which (x, y) is located so that the conditions are satisfied.

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