Functions and Function Notation

Solve for f(5):
f(5) = -x + 4

• 9 

• 1

• -1

• -9

Which graph does NOT pass the vertical line test?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Is this a function?

• Yes

• No

• Let me ask my dog...

• Why are there letters in math?

Is this a function?

• Yes

• No

• I'm Confused

• May I phone a friend?

Given f(x) = 3(6 -x), what is the value of f(-8)

• -42

• 6

• -6

• 42

Which set of values is not a function?

• (9,5) (10,5) (4,-5) (8,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (-5, -7) (1, 4)

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) = x²-x+3, what would the function look like once you substitute in a -3 to find f(-3)?

• f(-3) = -3²-3+3

• f(-3) = (-3)² -(-3)+3

• f(-3) = (-3)² -3+3

Evaluate f(-2) if f(x) = x²+ 3

• -1

• 1

• 7

• -7

Evaluate f(-5) if f(x) = -2x - 12

• -22

• -2

• -19

• -5