Topic 3 Test

Which set of values 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)

Is this table a function or not a function? 

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function 

r(-2) = ?

• r(-2) = -12

• r(-2) = -8

• r(-2) = -4

• r(-2) = -2

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

• Let x = 2

• Let y = 2

f(x) is the same thing as ______.

• y
• x
• input
• an equation

If f(x) = 2x + 5, find f(-3).

• 1

• -1

• 4

• -4