1. QUADRATIC GRAPHS
Tables of values

2. For more complicated quadratic graphs it is expected that a table of values needs to be used in order to work out the y co-ordinates.
A table of values simply organises the calculation in a more effective way.

3. Draw a suitable pair of axes and plot the parabola.
Example:
Draw the graph of y = x2 – 6 ; for x between – 3 and + 3. X
- 3
- 2 1 2 3 x2
- 6 y 3
- 2
- 5
- 6
- 5
- 2 3
Draw a suitable pair of axes and plot the parabola.

4. x x x x x x x x -3 -2 -1 1 2 3 - 2 - 5 - 6 y = x2- 6 1 2 3 -1 -2 -3 x-5 -4 -6 y x x x x x x -3 -2 -1 1 2 3
y = x2- 6
- 2
- 5
- 6

5. Draw a suitable pair of axes and plot the parabola.
Example:
Draw the graph of y = x2 – 4x ; for x between – 1 and + 5. X
- 1 1 2 3 4 5 x2
- 4x y 4
- 0
- 4
- 8
- 12
- 16
- 20 5
- 3
- 4
- 3 5
Draw a suitable pair of axes and plot the parabola.

6. 3 2 4 -1 1 x
- 4 -2 -3 5 y x x x x 5 x x x X
- 1 1 2 3 4 5 y
- 3
- 4

7. Draw a suitable pair of axes and plot the parabola.
Example:
Draw the graph of y = x2 + 2x ; for x between – 4 and + 2. X
- 4
- 3
- 2
- 1 1 2 x2 2x y
- 8
- 6
- 4
- 2 2 4 8 3
- 1 3 8
Draw a suitable pair of axes and plot the parabola.

8. 8 y
- 4 2
- 1 x X
- 4
- 3
- 2
- 1 1 2 y 8 3
- 1