Miyerkules, Marso 7, 2012

Demonstration Lesson Plan in Mathematics


Demonstration Lesson Plan in Mathematics



I.                    Objectives
1.       Identify the intercept form of the linear equation
2.       Define the x and y intercept
3.       And, explain how to solve or determine the x and y intercept of the given linear equation
II.                  Subject Matter
Topic: the Intercept
Reference: Bernabe, Jullieta G., Geometry III, pp 230-231
Materials: wyteboard, meter stick, power point presentation
III.                Teaching Strategies
a.       Daily Routine
b.      Review of the past lesson
The students must able to answer the following question:
1.       What is a linear equation?
2.       What is the general form of equation of the linear?
c.       Motivation
Try to find words related to a word linear equation:
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d.      Lesson Presentation
“The intercept”
Definition of the intercept….
e.      Discussion
Consider the graph of the linear equation 2x+3y=6
The set of ordered pair which satisfy the equation are (-3, 4) (0, 2) (3, 0) (6,-2).
Notice that two of the ordered pairs have zero as one of their coordinates. The points whose coordinates consist of the no. pair (0, 2) intersect the y- axis thus the ordinates two of this point is called the y intercept. The points whose coordinates consist of the no. pair (3, 0) intersects the x - axis, thus the abscissa 3 of this point is called the x- intercept.





Illustrative Example:
                Find the x and y intercept of the graph of 5x + 3y = 15

To find the x – intercept
Let y = 0
5x + 3y = 15
5x + 3(0) = 15
5x = 15
X = 3

The x- intercept is 3. The graph crosses the x- axis at (3, 0)

To find the y - intercept
Let x = 0
5x + 3y =15
5(0) + 3y =15
3y = 15
Y =5

The y- intercept is 5. The graph crosses the y – axis at (0, 5)


IV.            Generalization
The x intercept and the abscissa of the point   (a, o) where a graph intersect the   x –axis. The y intercept is the ordinate of the point (0, b) where a graph intersects the      y – axis.
       V.              Evaluation
Find the x and y intercept for each of the following:
1.       2x + y = 6
2.       5x + 3 = y
3.       y = 6x + 3
4.       3x – 7 = y
5.       5x +y =10
       VI.            Assignment
Find the x and y intercept for each of the following:
1.       3x – 6y = 12
2.       5x + y = 10
3.       8x + y = 4
4.       y = 4x -2
5.       y = 1/2 x +5




























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