1. Bell Ringer
What does it mean to substitute?

2. Coordinate System and Ordered Pairs
9/12/2017

3. Vocab
Ordered Pair – a solution of an equation in two variables if replacing the variables by the values of the ordered pair results in a true statement.
x-coordinate – the value of the ordered pair that distinguishes movement left or right
y-coordinate – the value of the ordered pair that distinguishes movement up or down

4. Plotting ordered pairs
Plot the following ordered pairs
(5, 3)
(0, 2)
(-5, 3)
(1, -2)
(0, 0)

5. Determine if the ordered pairs are solutions
Given the equation 𝑥−2𝑦=6, are the following ordered pairs solutions?
(6, 0)
(0, 3)
(1, − 5 2 )

6. You try
Given the equation 𝑥+3𝑦=6, are the following ordered pairs solutions?
(3, 1)
(6, 0)
(-2, 2 3 )

7. Completing the ordered pair (find the missing coordinate)
Use the equation, 3𝑥+𝑦=12 to find the missing solutions
(0, )
( , 6)
(-1, )

8. Your turn Use the equation, 2𝑥−𝑦=8 to find the missing solutions (0, )
(0, )
( , 4)
(-3, )

9. Complete the Table
Use the equation 𝑦=3𝑥 to complete the following table x y -1 9

10. Time to work Open books to pages 184-185
Answer question 40 – 60 EVENS ONLY!!!!!

11. Due today Determine is the orders pairs are solutions
Complete the tables
𝑦=−9𝑥
2𝑥+𝑦=4
Determine is the orders pairs are solutions
3𝑥+𝑦=8; 2, 3 0, 8 8, 0
𝑦=− 1 2 𝑥;(0, 0)(4, 2)
𝑦=−2;(−2, 2)(2, −2)(0, 2)
Find the missing coordinate
𝑥−5𝑦=−1; , 2 4,
𝑦= 1 5 𝑥−2:(−10, )( ,1)
𝑥−4𝑦=4;( ,2)(4, ) x y -3 2 x y 4 2