Transcript 2-1

2-1 Ordered Pairs
Bell Work
Solve.
1. 5 = a – 2
a=7
2. 7 + n = 24
n = 17
4. 17y + 7 = 58
3. 3c – 7 = 32
c = 13
y=3
2-1 Ordered Pairs
Learning Target:
I can
• Determine if an ordered pair is a solution
to an equation
• Create a table of Ordered Pair Solutions
2-1 OrderedVocabulary
Pairs
ordered pair
equation
solution
- an (x, y) point
- a math sentence
- it has an = sign
- a value for the variable
that makes an equation true
2-1 Ordered
Pairs
Do this
one along with me:
Determine whether each ordered pair is a
solution of y = 4x – 1.
(3, 11)
y = 4x – 1
?
11 = 4(3) – 1
11 = 11 
Substitute 3 for x and 11 for y.
Simplify.
(3, 11) is a solution.
this one Pairs
and check with your partner:
2-1 Try
Ordered
Determine whether each ordered pair is a
solution of y = 4x – 1.
(10, 3)
y = 4x – 1
?
3 = 4(10) – 1
3 ≠ 39 
Substitute 10 for x and 3 for y.
Simplify.
(10, 3) is not a solution.
Try Pairs
this one by yourself:
2-1 Ordered
Determine whether each ordered pair is a
solution of y = 5x + 3.
(7, 38)
y = 5x + 3
?
38 = 5(7) + 3
Substitute 7 for x and 38 for y.
?
38 = 38 
(7, 38) is a solution.
2-1 Ordered Pairs
Just in case we need another…
Determine whether each ordered pair is a
solution of y = 5x + 3. (9, 17)
y = 5x + 3
?
17 = 5(9) + 3
?
Substitute 9 for x and 17 for y.
17 = 48 
(9, 17) is not a solution.
Work out this
example along with me:
2-1 Ordered
Pairs
Use the given values to make a table of
solutions.
y = x + 3 for x = 1, 2, 3, 4
x
x+3
y
(x, y)
1
1+3
4
(1, 4)
2
2+3
5
(2, 5)
3
3+3
6
(3, 6)
4
4+3
7
(4, 7)
out this
example with your partner:
2-1 Work
Ordered
Pairs
Use the given values to make a table of
solutions.
n = 6m – 5 for m = 1, 2, 3
m
6m – 5
n
(m, n)
1
6(1) – 5
1
(1, 1)
2
6(2) – 5
6(3) – 5
7
3
13
(2, 7)
(3, 13)
Try doing
this one by yourself:
2-1 Ordered
Pairs
Use the given values to make a table of
solutions.
y = x + 6 for x = 1, 2, 3, 4
x
x+6
y
(x, y)
1
1+6
7
(1, 7)
2
2+6
8
(2, 8)
3
3+6
9
(3, 9)
4
4+6
10
(4, 10)
2-1 Ordered Pairs
Do you have the
learning targets
mastered?
In the last
box of your note page:
2-1 Ordered
Pairs
Determine whether each ordered pair is a
solution of y = 4x – 7.
1. (2, 15) no
2. (4, 9) yes
3. Use the given values to make a table of
solutions. y = 4x  6 for x = 2, 4, and 6
x
4x – 6
y
(x, y)
2
4(2) – 6
2
(2, 2)
4
4(4) – 6
10
(4, 10)
6
4(6) – 6
18
(6, 18)
2-1 Ordered Pairs
Assignment:
• Hand out
• Please wait for instructions