Parabolas

x-intercept

100

This is the y-value of the x-intercepts of a parabola?

0

200

The graph of y = x² has this many x-intercepts

1, at (0,0)

300

Find the x-intercepts

y = x² - 16

(-4,0) and (4,0)

y-intercept

100

In standard form, f(x) = ax² + bx + c

This letter reveals the value of the graph's y-intercept

c

200

This is the x-value of the y-intercept of any graph

0

300

Find the y-intercept of the following function?

y= 2x² + 12x + 20.

(0,20)

Vertex / Axis of symmetry

100

This is the format for the equation of an axis of symmetry in any form

x = ______

(it's a vertical line!)

200

This is how you can tell if a vertex is a maximum or a minimum

If a is positive, vertex is a minimum

If a is negative, vertex is a maximum

300

This is the vertex form of a parabola

f(x) = a(x - h)² + k

400

Find the axis of symmetry and vertex of the following function:

f(x) = (x + 1)² - 4

Vertex: (1, -4)

A.O.S.: x = 1

500

Find the vertex and axis of symmetry of the following function

f(x)= -3x² + 6x +12

Vertex: (1, 15)

A.O.S.: x = 1