Quadratic Functions

The video tutorial covers the basics of quadratic functions, including their definition, standard form, and graphical representation as parabolas. It explains key features such as the vertex, axis of symmetry, domain, and range. The tutorial also discusses how to identify x and y intercepts, and the significance of the standard form in determining these intercepts. Additionally, it covers the concepts of increasing and decreasing intervals, and how to determine maximum and minimum points on the graph. Finally, the video explains the solutions of quadratic equations, the role of the discriminant, and how it affects the number of real solutions.

What is the highest degree of a variable in a quadratic expression?

• Four

• Three

• Two

• One

In the standard form of a quadratic equation, what does the 'C' represent?

• Vertex

• Y-intercept

• X-intercept

• Axis of symmetry

What is the domain of a quadratic function?

• Negative numbers only

• Integers only

• Positive numbers only

• All real numbers

How do you determine the range of a quadratic function?

• By the axis of symmetry

• By the vertex

• By the y-intercepts

• By the x-intercepts

What is the interval of increase for a quadratic graph?

• From the vertex to positive infinity

• From negative infinity to the vertex

• From zero to the vertex

• From the vertex to zero

What shape does the graph of a quadratic function take?

• Ellipse

• Parabola

• Line

• Circle

What is the turning point of a quadratic graph called?

• Intercept

• Vertex

• Root

• Axis

How many real solutions can a quadratic equation have?

• Zero, one, or two

• Only one

• Only two

• Three or more

What does a positive discriminant indicate about a quadratic equation?

• Infinite solutions

• One real solution

• Two real solutions

• No real solutions

If the vertex of a quadratic function lies on the x-axis, how many solutions does it have?

• Two

• One

• Infinite

• Zero