Functions and Function Notation

Is the relation a function? 
{(4,5), (4,-7), (4,2), (4,0), (4,9)}

• Yes
• No

Is this mapping a function or not a function? 

• Function
• Not a Function 

Is this table a function or not a function? 

• Function
• Not a Function

Is this a function? Explain.

• Yes; it passes the horizontal line test.
• No; it is not a straight line.
• Yes; it passes the vertical line test.
• No; there is a line connecting the dots.

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.

For the function f(x) = -3x + 3 find f(0).

• 0
• -3
• 3
• -1

Evaluate f(-2) if f(x) = x²+ 3.

• -1
• 1
• 7
• -7

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

• 9 
• 1
• -1
• -9

Solve for x:
f(x) = 75
f(x) = 25x

• x = 75
• x = 25
• x = 3
• x = 4

What is the value of x in:
f(4) = 3x - 1

• 11
• 4
• -1
• 0