Instructions: Find the line of symmetry of each quadratic function.
How to find the line of symmetry.
Remember, the line of symmetry for a quadratic function, y = ax2 + bx + c is
x = -b/2a.
1. y = x2 + 4x
2. y = -x2 + 4x
3. y = 1.5x2 + 16x
4. y = -1.5x2 + 16x
5. y = 15x2 + 15x
6. y = 3x2 - 6x
7. y = 9x2 - 12x
8. y = -x2