Functional Notation

What is the Range?

• {-3, -1, 1, 3, 5, 7, 9}

• {-3, -2, -1, 0, 1, 2, 3}

• -3 ≤ x ≤ 3

• -3 ≤ x ≤ 9

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

If f(x) = 2x + 1, what would be your first step to find f(1)?

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

If f(x) = 2x + 1, find f(1).

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

g(x) = 3x + 1
g(2) = _______

• 6

• 7

• 8

• 9

g(x) = 3x + 1
g(10) = ______

• 14

• 31

• 15

• -31

j(x) = 2x + 3
j(-1) = ______

• 1

• -1

• 5

• -5

Let w(x) = 3x - 7. If w(x) = 14, find x.

• 7

• 35

• 2.33333

• -49

Given f(x) = -4x - 10 and f(x) = 10. Find x

• x = -5

• x = 5

• x = -50

• x = 30

Given f(x) = -2x + 10, find f(2). 

• f(2) = 6

• f(2) = 14