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PUNCHLINE. Algebra . Book A
@2006 Marcy Mathworks
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Fill in each blank witrh one of the choices to Lhe ri6hL The lelter to the
lefl, of each blank qoee in lhe box conLaininq the number of lhe anewer.
The Coordinole Plqne
rr. f
/v-'rr-ii r,'e-t-Je- plane has two number lines that intersect
at a point called the
. The horizontal number
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The vertical number line is
rL GD line is called the Y - /LKIS
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6r
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say Drciev-r...i n*;t r
@ point in the coordinate plane is given using
toi G' of numbers. The first number is the .-al''*ru.fl[.-'
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second number is
the
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7.
19.
origin
x-coordinate
3. intercept
quadrants
coordinate
25. y-coordinate
12. x-axis
l. ordered pair
15.
18.
graph
5. y-axis
2O.
andquadrants inthefgure atthe top oJthe ansu)er cotumn.
Equotions in Two Voriobles
For an equation with two varia-bles, x and y, a pair of values
2t @) (x,v) that make the equation trr-e is called a r5lzl.",{:r =:i<*of the equation. Each solution is an tlfe\zr,eel .fl-<tr rl The
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value of x is written & rst
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; the value of y is written
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Each solution can be represented as a
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in the coordinate plane. The,set of all points
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f*^t
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reiresenting solutions is called ttre 4 rc.-:tah of the
a'
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GD equation. An equation in two variables has an r fi4r nr Je
number of solutions, so there is an infinite number of
in the graph.
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8. second
13. slope
2.
infinite
23. first
28. point
21. solution
lO. points
9. number
ll. ordered pair
16. gpaph
Lineor Equolions
If the graph of an equation in two variables is a straight line,
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GD the equation is a li ne r;*v- equation. Every solution
t
can be represented by a Fcx r,-t-{*
on the line, and every
point
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For example, the equation U = 2x + 5 is a linear equation
J1 @ because its graph is a I r t'1e
. One solution of this
r"l @ equation is
. 2x + 3U = 9O is a linear equation
G @ because its Ci ft''
is a line. In a finear equation, the
lz @ highest po*.rif either variable is the
power.
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17. (3,I 1)
4" point
20. (5,12)
line
first
26. intercept
24. linear
6. glaph
14. solution
27.
22.
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Linear Equations and Their Graphs:
PUNCHLINE . Algebra. Book A
02006 Marcy Mathworks
Vocabulary
7.4