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Unit 2, Activity 1, A Review of the Quadratic Function with Answers
Blackline Masters, Advanced MathPreCalculus
Page 51
Louisiana Comprehensive Curriculum, Revised 2008
4. For each of the graphs below write a) an equation in factored form and (b) a possible
equation for the function in the form
c
bx
ax
y
+
+
=
2
.
a) y = (x – 6)(x + 2)in factored form
and a possible equation
y = x
2
 4x – 12
b) y = (x + 2)(x + 2) in factored form
and a possible equation
y = x
2
+ 4x + 4
c) y = (x + 5)(x – 5) in factored form
and a possible equation
y =
25  x
2
5. If a ball is thrown upward from a building 20 meters tall, then its approximate height
above the ground t seconds later is given by h(t) = 20 + 25
t
4.9
t
2
.
a. After how many seconds does the ball hit the ground?
20 + 25t – 4.9t
2
= 0 at t
≈
5.8 seconds
b. What is the domain of this function?
domain {t : 0 < t < 5.8}
c. How high does the ball go?
maximum height is
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This note was uploaded on 10/10/2011 for the course MAC 1147 taught by Professor German during the Fall '08 term at University of Florida.
 Fall '08
 GERMAN
 Calculus, PreCalculus

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