4-6 Functions A

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}
• {(2,7), (3,7), (4,7), (5,8)}
• {(1,-5), (-1,6), (1,5), (6,-3)}
• {(3,-2), (5,-6), (7,7), (8,8)}

What is x if

f(x) = -1?

• 4

• 0

• 3

• 6

Does this represent a function?

• Yes

• No

Which of these is NOT the same

• Range
• Input
• Dependent Value
• Y-Value

What is f(1)?

• 1
• 5
• 0
• 4

The function h(t) represents the amount made at Best Buy after t hours. What does the notation h(4) = 500,000 mean?

• After 500,000 hours Best Buy made $4

• Best Buy makes money at a rate of 500,000/4 hours per dollar

• After 4 hours Best Buy has made $500,000

• Best Buy makes money at a rate of $500,000 hours per week

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

What is x if
f(x) = -2?

• 4
• 0
• 3
• 8

Is this a function?

• Yes 

• No 

• Maybe 

• So...

f(-12) if f(x) = 2x + 15