Quadratic Functions 5

Which of the following is graph of y = 3x² – 9x?

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Which of the following is graph of y = x² – 3x – 4?

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Given y = x² – 6x + 1 tranform into y = (x + a)² + b ,where a and b are constant then the value of b

• -10

• -9

• -8

• 8

Given graph of y = ax² + bx + c. Which of the following is correct?

• a > 0 and c > 0

• a > 0 and c < 0

• a < 0 and c > 0

• a < 0 and c < 0

Which function is this graph?

• y = 11 + 2x - x²

• y = 11 - 2x - x²

• y = 10 + 4x - 2x²

• y = 10 - 4x - 2x²

Which of the following is the symmetry axis of y = x² + 5x + 1?

• x = -1

• x = 1

• x = 5

What point isn't on the graph of y = 2x² – 4x + 1 ?

• (-2, 17)

• (0, 1)

• (3, 7)

• (-3, 31)

What is the vertex of graph y = 6x – x²?

• (3, 9)

• (3, 6)

• (6, 1)

• (6, -1)

Find the x-intercept of y = –x² + 7x – 6

• (1, 0) and (6, 0)

• (1, 0) and (5, 0)

• (1, 0) and (4, 0)

• (1, 0) and (3,0)

Which function has the same symmetry axis as the y = –x² + 2x – 1?

• y = 2 + 4x + 2x²

• y = 1 - 2x - x²

• y = 5 + 4x - 2x²

• y = 2 - 4x + x²