1.1 Investigation: Ordered Pairs and Solutions
An equation in one variable, such as 2x + 1 = 7,
has one real value of x as a solution.
2x + 1 = 7
2x = 6
x = 3 The solution is 3.
1
How many solutions does the
equation 2x + y =9 have?
One
Ten
infinite
number
2
Find three ordered pairs that
satisfy the equation 2x + y = 9.
3
Which ordered pair satisfies
the equation x-y=-1?
(2,3)
(-1,-2)
(-5,6)
4
Now work with a partner to complete
parts 2 and 3 of the investigation on
pages 4 and 5 of your textbook.
Write complete answers in your notebook.
5
6
7
8
9