Standard Form Quadratic Functions

What is the decreasing interval on the function shown?

Identify the y-intercept.

• (0,3)

• (3,0)

• (1,0)

• (2,-1)

Tags

CCSS.HSF-IF.C.7A

Write a quadratic equation given the x intercepts and one other point.

Step 1: Write the factors.

The intercepts of this function are (6, 0) and (8, 0). Write the factors.

• (x-6) and (x-8)

• (x+6) and (x+8)

• (x-6) and (x+8)

• (x+6) and (x-8)

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Which parabola would open down?

• f(x)=x²

• f(x)=-x²+3x-6

• f(x) = x²-16

• f(x)=2x²-5x+7

Tags

CCSS.HSF-IF.C.7A

What do you call the graph of quadratic functions?

• hyperbola

• parabola

• vertex

• ellipse

Tags

CCSS.HSF-IF.C.7A

Which equation could match the graph?

• y = (x + 1)(x + 4)

• y = (x - 1)(x - 4)

• y = (x - 4)(x - 4)

• y = (x + 2.5)(x + 4)

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Use the picture to find  the vertex and axis of symmetry

•  Vertex (3,8) Axis x=3

• Vertex (3,8) Axis y=3

• Vertex (8,3) Axis x=3

• Vertex (8,3) Axis y=3

The standard form of a quadratic function is

• ax² + bx + c

• a(x - h)² + k

• y - y₁ = m(x - x₁)

• Ax + By = C

What is the axis of symmetry of:y=2x²-4x+9

• x = 1

• x = -1

• x = -2

• x = 4

What are the green dots called?

• axis of symmetry

• vertex

• parabola

• roots or x-intercepts

Tags

CCSS.HSF-IF.C.7A