Function Notation

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

• -9

• -3

• 9

• 3

b(x) = 2x - 3
b(-2) = ______

• -7

• -1

• 7

• 1

b(x) = 2x - 3
b(-1) = ______

• -1

• 5

• 1

• -5

b(x) = 2x - 3
b(-3) = ______

• -9

• 3

• 9

• -3

f(x) = x+7 find f(1)

• 5

• 6

• 7

• 8

f(x) = x+7 find f(4)

• 11

• 12

• 9

• 10

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, what would the function look like once you substitute in a 1 to find f(1)?

• f(x) = 21+1

• f(1) = 2 (1) + 1

• f(1) = 2x (1) + 1

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

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3