M116

Which of the following is a quadratic function?

• f(x)=2x+3

• f(x)=x2+4x+1

• f(x)=x/3​

• f(x)=∣x∣+2

What is the shape of the graph of a quadratic function?

• Line

• Circle

• Parabola

• Rectangle

The vertex of a parabola is the highest or lowest point on the graph.

• True
• False

The equation y = x² + 2x + 1 is in standard form.

• True
• False

What is the vertex of the function f(x)=(x−3)²+2?

• (3, 2)

• (-3, 2)

• (2, 3)

• (2, -3)

Every quadratic function has exactly one x-intercept.

• True
• False

In the quadratic function f(x)=ax²+bx+c, if a<0, the parabola

• Opens upward

• Is a straight line

• Has no graph

• Opens downward

If a quadratic function has a positive leading coefficient, its graph opens downward.

• True
• False

Which of the following is the vertex form of a quadratic function?

• f(x)=ax²+bx+c

• f(x)=a(x−h)²+k

• f(x)=(x+a)²+b

• f(x)=ax+b

The vertex of the quadratic function f(x)=ax²+bx+c can be found using the formula x= .