Unit 2 Review

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

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

What is the definition of a function?

• Has inputs and outputs

• Inputs have different outputs every time

• x-values and

  y-values

• Every input has only one output

Is this a function or not a function?

• Function
• Not a Function

Which set of ordered pairs is a function?

• {(9,5), (10,5), (9,-5), (10,-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)}

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

• Function
• Not a Function

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

• Let x = 2

• Let y = 2

What is f(1)?

• 1
• 5
• 0
• 4

What is f(8)? 

• 8
• 0
• 3
• -2

f(x) is the same thing as ______.

• y
• x
• input
• an equation