Function Notation and Evaluating Functions with Algebra

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.

Is this a function?

• Yes

• No

• Let me ask my dog...

• Why are there letters in math?

What is the range of the function?

• -7≤x≤6

• -7<x<6

• -8<y<2

• -8≤y≤2

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.

If f(x) = 3x - 9, find f(5).

• f(5) = 6

• f(5) = 16

• f(5) = -4

• f(5) = 24

Find f(2)

• 5

• 4

• 3

• 0

Is the relation a function? Why?

• Yes, because the x-value 11 has two y-values paired 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 paired with it.

• No, because each x-value has only one y-value paired with it.

Is this table a function or not a function? 

• Function

• Not a Function

Evaluate f(-2) if f(x) = x + 3

• -1

• 1

• 5

• -5

Given the function, f, shown on the graph, what is the value of f(3)?

• 0

• 2

• 6

• 1