All Forms of Quadratic Functions

Which of the following equations shows the y-intercept of a quadratic function?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

What formula can be used to find the axis of symmetry when given the equation of a parabola in standard form?

• x = -a

• x = -b/a

• x = b/2a

• x = -b/2a

Which of the following equations shows the x-intercepts of a quadratic function?

• y = a(x - m)(x - n)

• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

Which of the following equations shows the vertex of a quadratic function?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

Does the quadratic function open up or down?  y = -3x² +7x - 2

• up
• down
• both 
• neither

Tags

CCSS.HSF-IF.C.7A

What is the y intercept for the equation:
y = -8x² + 3x - 7

• (0, -8)
• (0, 3)
• (-8, -7)
• (0, -7)

Tags

CCSS.HSF-IF.C.7A

Find the axis of symmetry for f(x) = x² - 8x + 15.

• x = -4
• x = 4
• y = 4
• y = -4

Which equation gives the x-intercepts of the quadratic function graphed?

• y = -(x - 2)² + 1

• y = -(x + 1)(x + 3)

• y = -(x - 1)(x - 3)

• y = (x - 1)(x - 3)

Tags

CCSS.HSF-IF.C.7A

Which equation gives the vertex of the quadratic function graphed?

• y = (x + 3)² - 1

• y = (x - 3)² - 1

• y = (x - 2)(x - 4)

• y = x² - 6x + 8

What is the vertex of function

f(x) = 3(x + 4)² - 8?

• (4,-8)

• (-4,-8)

• (3,-8)

• (-4,8)