Practice and Problem-Solving Exercises

A Practice

See Problem 1.

Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of each function.

7. y = 2 x 2 + 3 y equals , 2 x squared , plus 3
8. y = − 3 x 2 + 12 x + 1 y equals negative , 3 x squared , plus 12 x plus 1
9. f ( x ) = 2 x 2 + 4 x − 1 f open x close equals , 2 x squared , plus 4 x minus 1
10. y = x 2 − 8 x − 7 y equals , x squared , minus 8 x minus 7
11. f ( x ) = 3 x 2 − 9 x + 2 f open x close equals , 3 x squared , minus 9 x plus 2
12. y = − 4 x 2 + 11 y equals negative , 4 x squared , plus 11
13. f ( x ) = − 5 x 2 + 3 x + 2 f open x close equals negative , 5 x squared , plus 3 x plus 2
14. y = − 4 x 2 − 16 x − 3 y equals negative , 4 x squared , minus 16 x minus 3
15. f ( x ) = 6 x 2 + 6 x − 5 f open x close equals , 6 x squared , plus 6 x minus 5

Match each function with its graph.

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