Graphing Quadratic
Functions in
standard form
A
u-shaped curve called a Parabola.
 Parabolas
 They
can open up or down.
have a vertex point and an axis of
symmetry.
 In
standard form: f(x) = ax2 + bx + c
 If a > 0, the parabola will open up.
 If a < 0, the parabola will open down.
 The x-coordinate of the vertex is –b
2a
 The axis of symmetry is the line x = –b
2a
1.
Find the coordinates of the
vertex and the axis of symmetry.
2. Make a table and find at least
one point on either side of the
vertex.
3. Plot all points and connect with
a parabola curve.
4. The axis of symmetry is
represented by a dashed line.
 1.
f(x) = 2x2
 2.
g(x) = -½x2 – x + 6
 3.
h(x) = 3x2 + 2x