Function Notation and evaluation

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

How do you read f(x)?

• f x

• f of x

• f parenthesis x

• f with an x inside parenthesis

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

If f(x) = 2x² + 5x - 3, evaluate f(-1).

• f(-1) = -6

• f(-1) = 1

• f(-1) = -10

• f(-1) = -1

If h(x) = -5x + 7,

Evaluate h(2).

• -2

• 3

• -18

• -3

Is this mapping a function or not a function? 

• Function
• Not a Function 

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

• Yes
• No

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.