Algebra II by: Mr. Pol Ogrimen Jr.
description
Transcript of Algebra II by: Mr. Pol Ogrimen Jr.
Algebra IIby: Mr. Pol Ogrimen Jr.
x-axis or
abscissa
y-axis or ordinate
origin
.P(x , y)
Coordinates of a point
Carte
sian
Pla
ne
or Rec
tangula
r
Coordin
ate
Plane
I. Plot the ff. Ordered pairs
or points
1)(-4 , 4)
2)(2 , 3)
3)(0 , 2)
4)(5 , 1)
5)(4 , 0)
* 1)
* 2)
* 3)
* 4)
* 5)
* A
* B
* C
* D
II. Determine the coordinates
of the ff. ordered pairs
or points
A, B, C, D
A. (1 , -4)
B. (-2 , -2.5)
C. (0 , -5)
D. (4 , -1)
Plotting Points
x-axis
y-axis Linear Equation in two Variables
ax + by + c =0: General form
where x and y are the variable while a, b, and c are elements of real numbers
ax + by = c : Standard form
Examples:
1) 2x + 5y + 10 = 0
2)2x + 5y = – 10
3)4x – y – 6 = 0
4)x – 3y = – 12
x-axis
y-axis G
raph
ing
a lin
ear
equa
tion
in tw
o
varia
bles
A. Assign any values for x and solve for y. Example1) x + 2y = 4 in standard form
x y
2
-2
-4
13
4
x-axis
y-axis G
raph
ing
a lin
ear
equa
tion
in tw
o
varia
bles
x y
0
0
24
B. Apply the x and y – intercept: Let x=0 and solve for y; Let y=0 then solve for x.
*
*
x-axis
y-axis G
raph
ing
a lin
ear
equa
tion
in tw
o
varia
bles
C. Write the slope-intercept form, y=mx+b. Example1) x + 2y = 4 x + 2y = 4 2y = -x + 4
22
1
xy
1st. Locate the y-int. = 2
2nd. Trace the slope = m
rightthetounit
downunit
run
risem
2
1
2
1
**
x-axis
y-axis G
raph
ing
a lin
ear
equa
tion
in tw
o
varia
bles
C. Write the slope-intercept form, y=mx+b. Example2) x – 4y – 8 = 0 – 4y = – x + 8 2
4
1 xy
1st. Locate the y-int. = – 2
2nd. Trace the slope = m
rightthetounit
upunit
run
risem
4
1
4
1
**