2-Step Equations
2x + 1 = 15
x = 7
2(x+5) = 12
x = 1
How do you describe a graph?
State the change in the x-value, and the change in the y-value
Continuous Data
(+3)(+6)
(+18)
-3x + 5 = 23
x = -6
4(x-1) = 16
x = 5
In an ordered pair, what value is always stated first.
x-value
A graph where the points cannot be connected.
Discrete Data
(-4)(+7)
(-28)
3 + 4x = -13
x = -4
-3(x+3) = 15
x = -8
In an ordered pair, which value is always stated second.
y-value
Which variable is independent?
The x-variable or input variable
2/3 x 9/14
3/7
6 - 2x = 10
x = -2
10 = -2(x-7)
x = 2
Create a table of values for the relation y=2x+3 with the input variables -2, -1, 0, 1, 2
See board.
Which variable is dependent?
The y-variable or output variable
3/5 divided by 7/15
1 2/7
-17 = -5 - 4x
x = 3
-4(-2 - x) = -20
x = -7
Graph the linear relation y=3x+1 for the input variables -2, -1, 0, 1, 2.
See board.
How you know a relation is linear?
When you graph it, it makes a straight line
1 2/3 divided by 2 1/4
20/27