Algebra 1 Common Core Student Edition, Grade 8-9

Ch ap t er Rev i ew

Connecting 8 1 0 ideas and Answering the Essential Questions

1 F u n c t i o n

The fa m ily o f quadratic

f u n c tio n s h a s e q u a tio n s o f th e

fo rm y = ax2 + bx + c,

where a + 0. The graph

o f a q u a d r a tic f u n c t io n is a

parabola.

2 So l v i n g Eq u at i o n s

and Inequalit ies

You can solve quadratic

equations using several

methods.

3 Modeling

To m odel a data set, choose

a fu n c tio n t h a t m o s t c lo s e ly

matches the pattern in the

data or graph.

Graphing Quadratic Functions

(Lessons 9-1 and 9-2)

Solving Quadratic Equations

(Lessons 9-3, 9-4, 9-5, and 9-6)

ax2 + bx + c = 0

_ -b ± Vb2 - 4ac

2 a

Choosing a M odel (Lesson 9-7)

0

y = mx + b y = ax2+ b x+ c y = a ‘ bx

Systems of Linear and Quadratic

Equations (Lesson 9-8)

w,

Two solutions One solution No solution

Ch ap t er V o c a b u l a r y

axis o f sym m etry (p. 546)

com pleting th e square (p. 576)

discrim inant (p. 585)

maximum (p. 547)

1 m i n i m u m ( p. 5 4 7 )

parabola (p. 546)

quadratic equation (p. 561)

quadratic form ula (p. 582)

Choose the correct term to complete each sentence.

1. The U-shaped graph of a quadratic function is a(n) ?.


2. The line that divides a parabola in half is the?.


3. The? can be used to determine the number of real-number solutions of a
   quadratic equation.


4. The ? of a parabola is the point at which the parabola intersects the axis of
   symmetry.

• qu adratic fu n ction (p. 546)


• root o f an eq u a tio n (p. 561)


• vertex (p. 547)


• z e r o o f a fu n c tio n (p. 561)

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