Intro to Functions and Notation

How was your weekend?

• 😵‍💫

• 😐

• 🥱

• 🥰

• 🫥

Is this is a function or not a function?

• Function
• Not a Function

Which image is NOT the graph of a function?

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• 
• 
• 

Is this graph a function or not a function? 

• Function 
• Not a Function

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 table a function or not a function? 

• Function
• Not a Function

Which set of ordered pairs 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)}

If I know that f(2) = 4, what is another way I can write my answer?

• 2,4

• (2, 4)

• That is the only way to write it.

Rewrite in function notation: (3, -2)

• F(-2) = 3
• F(3) = -2