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Algebra I Quiz - Calculate the Line of Symmetry II Answers

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Instructions: Find the line of symmetry of each quadratic function.

Remember, the line of symmetry for a quadratic function, y = ax2 + bx + c is

x = -b/2a.

How to find the line of symmetry.

 

Original quiz without answers.

1. y = 100x2 + 10x + 5
x = -1/20

2. y = -100x2 + 10x + 5
x = 1/20

3. y = 12x2 -2x + 144
x =
1/12 

4. y = x2 + 5x - 1
x =-5/2

5. y = -2x2 -16x + 16
x =-4

6. y = 49x2 + 84x + 36
x =6/7

7. y = 121x2 -198x -81
x =-9/11

8. y = 25x2 + 30x + 9
x =-3/5


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