Page 604 - Algebra 1

Lesson Practice
Give the coordinates of each parabola’s vertex. Then give the minimum or maximum value and domain and range of the function.
(Ex 1)
a. b.
x
y= x2 2x 5
-2
y
y
4
-4
-2
2
x
O
2
4
6
-6
-2
-8
-4
y
=
x2
10x + 22
Find the zeros of each function.
(Ex 2)
c.
d.
y
4
6
O
x
-12
-4
4
f(x)= x2 12x + 36
2
x
f(x) = x2+
12x + 27 -12
-8
-4
-4
2
e. x
f(x)=-x -2.5
4
6
8
y
-4
-2
2
4
-2
2
-6
-8
Find the axis of symmetry for each graph.
(Ex 3)
f. g.
y
2
(2,
0)
(7, 0)
12
4
6
8
-2
-4
(-8,
0)
4
O
(3, 0)
x
-6
Find the axis of symmetry for the graph of each quadratic function.
(Ex 4)
h. y = 3x2 + 12x + 4 i. y = -x2 + 6x + 5
j. A chunk of lava flies out of a volcano from a height of 12,447 feet (Ex 5) at a velocity of 608 feet per second. Find the highest point the lava
reaches and how long it takes to reach it using the equation y = -16t2 + 608t + 12,447.
y
-4
4
Lesson 89 589