Four 4s
4+4+4+4
16
4(3+2)
20
A variable that is being manipulated or chosen
Independent Variable
x+x+2x
4x
x+7=15
x=8
4*4-(4+4)
8
(2-6)/(10-8)
-2
A variable that "depends" on how the independent variable changes.
Dependent Variable
5x+x-2x
4x
3x-10=11
x=7
(4+4*4)/4
5
3+4^2-9
10
All the possible values of the independent variable.
4x+6-2x+1
2x+7
5x+12=-3
x=-3
(4*4)/(4+4)
2
3^2+4^2-9
16
All the possible values of the dependent variable.
Range
5(2x+3)-3x
7x+15
10x-8=52
x=6
(4^4)/(4+4)
32
(3+4)^2-9
40
A number multiplied with a variable.
For example in the expression 6x, what is the 6?
Co-efficient
3x^2+5x-x^2+2x
2x^2+7x
12x-72=3x
x=8