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1. QUADRATIC GRAPH

2. MEMBER OF THE
TEAM
Amiruddin bin Razale
Muhammad Iskandar Zulqarnain bin Mohd Ishak
Mohamad Daniel Hakeem bin Md Nazri
Muhammad Adam Qusyairi bin Zamzury
Wan Faris Haziq bin Wan Jalalludin

4. Quadratic Graph
The general expression for a quadratic function that takes the form ax2 +
bx +c where a, b and c are constant. Some examples of quadratic
functions are given below.
y = 2x2 + 3x – 12 y = x2 – 5x y = x2
If a graph of quadratic funtion is plotted, the smooth curve produced is
called a parabola.
parabola
REMEMBER !
THE SHAPE OF LINE
OF QUADRATIC
GRAPH MUST BE
CURVE.

6. There are two ways
that we can use to
solve the quadratic
graph of function :
TABLE
VALUE
REPLACE
VALUE

7. 1) First, look at the question given.
2) For example:
Using this equation, construct a table of
values and plot a graph.
Y = x2 + x – 2 -4 ≤ x ≤ 3
3) Construct a table value as the question
need.
* using a table, we can find the
coordinates.
TABLE VALUE SOLVING

8. Y = x2 + x – 2
-4 ≤ x ≤ 3
AXIS X
WE’LL GET THE
VALUE OF AXIS Y
USING THE TABLE

9. Y = x2 + x – 2 -4 ≤ x ≤ 3
x -4 -3 -2 -1 0 1 2 3
X2 16 9 4 1 0 1 4 9
+x -4 -3 -2 -1 0 1 2 3
-2 -2 -2 -2 -2 -2 -2 -2 -2
Y = x2
+ x –
2
10 4 0 -2 -2 0 4 10
We’ll considered the red font (x,y) colour as the coordinate.

10. x y
-4 10
-3 4
-2 0
-1 -2
0 -2
1 0
2 4
3 10

11. 10
8
6
4
2
0
-4 -3 -2 -1 1 2 3
-2
-4
-6
-8
-10

12. REPLACE VALUE SOLVING
1. Replace x value with the value
given.
e.g 1 :
2x2 – 1 -3≤ x ≤ 3

13. 2x2 – 1 -3≤ x ≤ 3
Replace x one by one following the value -3≤ x ≤
3
2x2 – 1
2(-3)2 – 1 17
2(-2)2 – 1 7
2(-1)2 – 1 1
2(0)2 – 1 -1
2(1)2 – 1 1
2(2)2 – 1 7
2(3)2 – 1 17
x y
-3 17
-2 7
-1 1
0 -1
1 1
2 7
3 17

14. 15
12
9
6
3
0
-3 -2 -1 1 2 3
-3

15. EXERCISE