Identifying Functions Graphs Practice

What is happening at D?

• Stationary

• Accelerating

• Fast steady speed; moving away from the starting position

• Slower steady speed; moving away from the starting position

Slowly increases at a CONSTANT rate.

• A

• B

• E

• D

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 mapping a function or not a function?

• Function; the x's don't repeat

• Not a Function; the x's repeat

Is this graph a function or not a function?

• Function; it passes the vertical line test

• Not a Function; it fails the vertical line test

Which graph is a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

How do you use the vertical line test?

• Draw vertical lines through your graph. If any of the vertical lines you draw intersects the graph more than once then the graph is not the graph of a function.

• Draw vertical lines through your graph. If any of the vertical lines you draw intersects the graph more than once, then it is a function.

Is this table a function or not a function?

• Function; the x's don't repeat

• Not a Function; the x's repeat

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)