Download Chapter 6 Sections 1 and 2

Chapter 6
Sections 1 and 2
Relations
Equations as Relations
Relations

A set of ordered pairs: {-4,1),(-3,5),(1,3)}
• Domain- the domain of a relation is the set of
all first coordinates from the ordered pairs of
the relation
• In other words, these are all of the x-coordinates
• Range- the range of the relation is the set of
second coordinates from the ordered pairs of
the relation
• In other words, these are all of the y-coordinates
Finding domain and Range

Express each relation as a table and as a
graph. Then determine the domain and the
range.
x
y
4,3 2,3 2,44,4
Domain:
Range:
4 2 24
3344
4
3
-2
3
-2
4
4
4
Your Turn

Express each relation as a table and as a
graph. Then determine the domain and the
range.
x
y
 4,21,02,33,1
Domain:
Range:
 4123
2031
-4
2
1
0
2
3
3
-1
From a graph

Express each relation as a set of
ordered pairs and in a table.
Assignment

Page 241
• Numbers 9-23
6-2
Equations as Relations
6-2 Equations as relations

Key terms-
• Solution of an Equation in Two Variables- if a
true statement results when the numbers in
an ordered pair are substituted into an
equation with two variables, then the ordered
pair is a solution of the equation.
Examples



Discover which answer choice is true.
All you have to do is plug ‘em in!
x+y=6
• a. (3,5)
b. (12, -6)
c. (2, -1)
b. (0, 5)
c. (-4, -3)
2x-3y=1
• a. (1, 1)
More Practice

Let’s do an example from your
workbook, page 36
• Number 7
Homework

Finish workbook page 36.