Finding The Vertex - Algebra Worksheet With Answers
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1
2Algebra 2
Name _____________________
nd
2
Quarter: Skills Review #2
Date _________ Block ______
10
Graphing QuadraticsReview: Finding the vertex.
2
VERTEX FORM: y = a (x - h)
+ k
Vertex: (h, k)
2
Standard Form:
INTERCEPT FORM: y = a(x – p)(x − q)
y = ax
+bx+c
Finding Vertex:
Finding vertex:
1. Find the x-intercepts (p and q)
1.
Find the x-value:
2. Find the x-value of the vertex:
b
p q
x
x
2a
2
2. Plug in the x-value above
3. Plug in the x-value above into
into the equation to find
the equation to find the Y-value
the Y-value of the vertex.
of the vertex.
Directions: For each quadratic function below, identify the form of the equation (vertex, intercept,
or standard) and find the vertex of the quadratic function. Show all work!
(For examples look at your Unit 4 Part 1 Notes packet)
2
1
2. f(x) = x
- 6x + 5
x
2
1. y =
(
1)
2
2
2
3. y = (x – 4) (x + 6)
4. y = - 2x
- 8x + 5
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