Graphing Quadratic Functions Worksheet Page 4
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4Graphing quadratic functions.[rev.4] Class/Section _______Name __________________ Date ________
ANSWERS
Δ
Equation
a
b
c
# of real
vertex
y-
Symmetric
roots
roots
interce
point
pt
2
1
f(x) = x
-6x+8
1
-6
8
4
2
(3,-1)
8
(6,8)
2,4
(factors)
2
2
f(x) = x
+4x+3
1
4
3
4
2
(-2,-1)
3
(-4,3)
-1,-3
(factors)
2
3
f(x) = x
-2x-15
1
-2
-15
64
2
(1,-16)
-15
(2,-15)
5,-3
(factors)
2
4
f(x) = x
+2x-8
1
2
-8
36
2
(-1,-9)
-8
(-2,-8)
2,-4
(factors)
2
5
f(x) = -x
-2x+3
-1
-2
3
16
2
(-1,4)
3
(-2,3)
-3,1
(factors)
2
6
f(x) = -x
-4x+5
-1
-4
5
36
2
(-2,9)
5
(-4,5)
-5,1
(factors)
2
7
f(x) = 2x
+7x+3
2
7
3
25
2
(-7/4,
3
(-7/2,3)
-3, - ½
(factors)
-25/8)
2
8
f(x) = 3x
-7x+2
3
-7
2
25
2
(7/6,
2
(7/3,2)
2, 1/3
(factors)
-25/12)
2
9
f(x) = -4x
+4x-1
-4
4
-1
0
2
(1/2,0)
-1
(1,-1)
½ , ½
2
10 f(x) = x
+6x+9
1
6
9
0
1 double
(-3,0)
9
(-6,9)
-3,-3
2
11 f(x) = x
+2x+5
1
2
5
-16
0
(-1,4)
5
(-2,5)
-1 ±2 i
2
-1 ± √2 i
12 f(x) = -2x
+4x-3
-2
4
-3
-8
0
(1,-1)
-3
(2,-3)
2
13 f(x) = x
+2x-5
1
2
-5
24
2
(-1,-6)
-5
(-2,-5)
-1±√6
2
-2 ±√3
14 f(x) = -x
+4x-1
-1
4
-1
12
2
(2,3)
-1
(4,-1)
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