2-2 Symmetry and vertex

• Wiskunde
• Middelbare school
• havo
• Leerjaar 3

2-2 Symmetry and vertex 

(p38)

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• Determine the factor when there is exponential growth.
• Determine the formula if you have the table for exponential growth between two variables.

• Determine the axis of symmetry.
• Calculate the intercepts for the vertex.

Refresh your mind ...

IA

10a

1. d=0 or d=0,01
2. d=0 or d=1
3. d=0 or d=10
4. d=0 or d=100

10b

1. 0
2. 20
3. 50
4. 100

10c

1. 0
2. 20
3. 50
4. 100

10d

1. 15
2. 25
3. 50
4. 100

Solution Q10

NOT

IA

Solution Q12

IA

15a

1. (3,5; -9,25)
2. (-8; -34)
3. (-2; -9)
4. (-2,5; -12,25)

15b

1. (3,5; -9,25)
2. (-8; -34)
3. (-2; -9)
4. (-2,5; -12,25)

15c

1. (3,5; -9,25)
2. (-8; -34)
3. (-2; -9)
4. (-2,5; -12,25)

15d

1. (3,5; -9,25)
2. (-8; -34)
3. (-2; -9)
4. (-2,5; -12,25)

Solution Q15 a-b

Solution Q15 c-d

IA

16a

1. (2;0) and (6;0)
2. (1;0) and (5;0)
3. (0;0) and (5;0)
4. (1;0) and (6;0)

16b

1. (3; -4)
2. (3; 4)
3. (1,5; -2)
4. (1,5; 2)

16c

1. (0;2)
2. (0;3)
3. (0;4)
4. (0;5)

16d

LQ

1. x=0
2. x=5
3. y=0
4. y=5

Solution Q16

Conclusion:

To calculate the axis of symmetry

1. Solve the equation for y=0
2. Determine the axis of symmetry (halfway between the two points where y=0)
3. Substitute this into the quation to calculate y
4. Write the intercept for the vertex.

Try on your own

1, 2, 5 and 7

TRY ON YOUR OWN

11; 13; 14 (p. 38)

RULES:

• In your writingbook
• Use: Textbook or iPad
• Discussion when you are stuck is allowed

Extra excercise: (p. 54)

Challenge: (p. 56)