Rectangular Coordinate

System

Objectives:

• Summarize concepts related to rectangular coordinate system;

• State the useful of Cartesian plain in real-life situations; and

• Create a simple representation that shows the use of the concept of the rectangular coordinate system (i.g., shapes, map reading, etc.)

REVIEW!!!

a. The point with coordinates (-5 , 3) can be graphed on the ___________________.

b. The coordinates of the origin is __________________.

c. The vertical axis of the Cartesian plane is called the ___.

d. The pair of numbers (2 , 4) is called a/an _____________ pair.

e. In the ordered pair (7 , -8), the -8 is called the ________.

Complete each sentence with the correct word or phrase.

REVIEW!!!

f. The x-coordinate is also called the ____________.

g. The intersection of the coordinate axes is called the ____________.

h. To plot the point with the coordinates (4 , -6), start at the _____________ and move 4 units to the _______________ and then move 6 units _______________.

i. To plot the point with coordinates (- ½ , 3), start at the _______________ and move ½ units to the ______________ and then move 3 units ____________.

REVIEW!!!

a. The point with coordinates (-5 , 3) can be graphed on the Cartesian plane/ x-y plane.

b. The coordinates of the origin is (0 , 0).

c. The vertical axis of the Cartesian plane is called the y-axis/ordinate.

d. The pair of numbers (2 , 4) is called a/an ordered pair.

e. In the ordered pair (7 , -8), the -8 is called the y-axis/ordinate.

Complete each sentence with the correct word or phrase.

REVIEW!!!

f. The x-coordinate is also called the abscissa.

g. The intersection of the coordinate axes is called the origin.

h. To plot the point with the coordinates (4 , -6), start at the origin and move 4 units to the right and then move 6 units downward.

i. To plot the point with coordinates (- ½ , 3), start at the origin and move ½ units to the left and then move 3 units upward.

To determine the quadrant for a given ordered pair, consider the signs of the coordinates:

( + , + ) means the point is in the first quadrant

( - , + ) means the point is in the second quadrant

( - , - ) means the point is in the third quadrant

( + , - ) means the point is in the fourth quadrant

Identifying Quadrants

Example:

a. ( 7 , -3 )

b. ( 5 , 5 )

c. ( -3 , -8 )

d. ( -10 , 4 )

e. ( 42 , 0 )

In which quadrant is each point located?

Assignment:

a. When is an equation called a linear equation in two variables? Give an examples.

b. Discuss how you will determine whether an ordered pair is a solution of a linear equation in two variables. Give examples.

Thank You!!!

That in all things, God may be Glorified!!!