Vocabulary
This is a set of inputs
Domain or x-value
What number is the x-value? (4,7)
4
f(2)=6
f(x)=x+4 Solve for f(x)=9x
x=5
This has exactly one output for each input
Function
What number is the y-value? (8,3)
3
f(x)= x+5 Solve for f(6)
f(6)=11
f(x)=5x Solve for f(x)=30
x=6
This is the set of outputs
Range or y-value
What number is the domain? (1,9)
1
f(x)=7x+4 Solve for f(x)=39
x=5
This is a set of ordered pairs
Relation
What number is the range? (5,2)
2
f(x)= -5x+4 Solve for f(-3)
f(-3)= 19
f(x)= -3x+8 Solve for f(x)=14
x=-2
4 ways a relation can be expressed as
1. Ordered pairs
2. Table
3. Map
4. Range
Identify the independent variable and the dependent variable. (8,5)
Independent: 8
Dependent: 5
f(x)=11x-x Solve for f(8)
f(8)=80
f(x)=12x-30 Solve for f(x)= -30
x=0