This is a free lesson from our course in Algebra I
In this section, you'll be looking at graphs of the quadratic functions. Standard Form of a Quadratic Function is:
f(x)= a(xh)^{2} +k,
The graph of the quadratic function
is called a parabola and is typically a curved shape.
What does 'a' tell us? When you have a quadratic function in either form,
f(x)= ax^{2} +bx+c
or
f(x)= a(xh)^{2} +k,
•
if a > 0, then the parabola opens up. •
if a < 0, then the parabola opens down. You'll notice in the graphs in this lesson that one of the main points
of a parabola is the vertex, which is the highest or the lowest point on the
graph i.e. it is the maximum or the minimum point of a quadratic function.
Winpossible's online math courses and tutorials have gained rapidly popularity since
their launch in 2008. Over 100,000 students have benefited from Winpossible's courses...
these courses in conjunction with free unlimited homework help serve as a very effective
mathtutor for our students.

All of the Winpossible math tutorials have been designed by topnotch instructors
and offer a comprehensive and rigorous math review of that topic.

We guarantee that any student who studies with Winpossible, will get a firm grasp
of the associated problemsolving techniques. Each course has our instructors providing
stepbystep solutions to a wide variety of problems, completely demystifying the
problemsolving process!

Winpossible courses have been used by students for help with homework and by homeschoolers.

Several teachers use Winpossible courses at schools as a supplement for inclass
instruction. They also use our course structure to develop course worksheets.