Math Practice exam

What is a Quadratic function?

• A quadratic function is a linear function of degree 1.
• A quadratic function is a polynomial function of degree 3.
• A quadratic function is a polynomial function of degree 2, expressed as f(x) = ax^2 + bx + c.
• A quadratic function is expressed as f(x) = ax + b.

which among these are a quadratic equation?

• f(x)=x² +2x+1

• f(x)=x+2²+6

• f(x)=x³ +4x² -9

What does a Quadratic Function look like in a graph?

The vertex form a quadratic equation is f(x)=a(x-h)²+k

• TRUE

• FALSE

Vertex form of f(x)=-x²+2x-3?

• f(x) = -1(x - 1)² - 2
• f(x) = -2(x - 1)² + 3
• f(x) = (x + 1)² + 2
• f(x) = -1(x + 2)² + 1

Vertex form of f(x)=-x²-4x+6?

• f(x) = -(x + 2)² + 4
• f(x) = -(x - 4)² + 10
• f(x) = -2(x + 2)² + 2
• f(x) = (x - 2)² + 6

What are the zeros of f(x)=-x²+2x -3 = 0.

• (1,2)

• No real zeros
• (1,-2)

• (-1,2)

What is the Min/Max of this function?

y = − 2 ( x − 4 )² + 1

• Max: 1

• Max: 4

• Min: 1

• Min: 4

• What is the Axis of Symmetry

• y = ( x + 2 )² − 4.

• x = -4
• x = -2
• x = 2
• x = 4

What is the domain of this function?

• y=20x² -15x - 10 = 0.

• (-∞,∞)

• (∞,-∞)

• (-∞,10]

• [10.∞)