Unit 4 Quadratics Test

Which of the following equations is NOT quadratic?

• f(x) = x² + 3

• y = 2x - 5

• f(x) = x² + x - 2

• y = -3/100 x²

Which quadratic equation IS in vertex form?

• y = (x - 2)² + 6

• f(x) = x² + 5x + 6

• y = 200x²

• y = -2x² + 5

A parabola is reflected to face down. The y-intercept is (0, 3). Which equation has the correct information?

• f(x) = -2x² + 5x + 3

• y = 3x²

• y = -3x²

• y = -3x² + 1

How does the following equation compare to the parent function, y = x²?

y = -(x + 1)² - 4

• Reflected across the x-axis, left 4, up 1

• Reflected across the x-axis, Right 1, up 4

• Reflected across the x-axis, left 1, down 4

• Left 1, down 4, more narrow

What is the vertex of the parabola? y = 4x² + 5

• (0,4)

• (0,5)

• (4,5)

• (5,4)

Which equation correctly matches the graph shown below?

Which equation correctly matches the graph shown below?

• x = -2, x = -3

• x = 1, x = 4

• x = 0 double root

• x = -1, x = -5

• x = -9, x = 9

• x = 3, x = -3

• x = 3 double root

• x = 0, x = -1

• [-3, ∞)

• [-∞, 0]

• (-∞, ∞)

• (0,3)