Topic 3 Review

What is the range?

• x≥0

• y≥0

• All real numbers

• {0, 1, 2, 3, 4,...}

Is this graph a function or not a function? 

• Function
• Not a Function

What is a function?

• For every input, there is exactly one output.
• For every output, there is exactly one input.
• When there is a polynomial expression
• When the degree of the polynomial is even.

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

• Yes
• No

• 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

Is this mapping a function or not a function? 

• Function
• Not a Function 

Is this graph a function or not a function? 

• Function
• Not a Function

Is the relation shown a function?

• No, because the x-value 11 is paired with 5 and 8.

• Yes, because each x-value has only one y-value paired with it.