Substitution
3x + 2y = 8
x = 3y + 10
(4, -2)
x + 2y = 6
3x - 2y = 2
(2,2)
y = 2x + 3
y = x + 6
(3,9)
What is a variable?
the x and/ or y
2x + y = 11
x = 4
(4,3)
3x + 4y = 24
2x - 4y = -4
(4,3)
y = -3x + 9
y = 2x + 4
(1,6)
What does the m represent in the equation?
y = mx + b
Slope
y = 8x - 20
y = 5x - 8
(4,12)
x + y = 7
x - y = 9
(8,-1)
y = 1/2x + 2
y = -x + 8
(4,4)
What does the b represent in the equation?
y = mx + b
y- intercept
x = 3 - 3y
4y = x + 11
(-3,2)
2x - 3y = -4
x + 3y = 7
(1,2)
y = 5x - 10
y = -x +2
(2,0)
What is the "official" word for plug in?
Substitute
3x + 2y = 28
y = 2x
(4,8)
2x + y = 5
3x - y = 5
(2,1)
y = 4x - 3
y = 4x + 2
No solution
Slope tells us to do _______ over ________.
Rise over run