Functions and Relations

Is the relation above a function?

• Yes, because it doesn’t show any repeating 𝑥 values in the domain.

• Yes, because every 𝑦 value in the range is different.

• No, because one 𝑥 value in the domain goes to multiple different 𝑦 values in the range.

• No, because there is an 𝑥 value in the domain that is equal to a 𝑦 value in the range.

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 a function? 

• Yes 
• No

• 4

• 8

• -4

• 6x-2

Let 𝑓(𝑥)=𝑥−7. Find the value of 𝑓(2).

• 5

• -7

• 7

• -5

What is the domain?

• the set of all x-values

• the set of all y-values

What is the range?

• the set of all x-values

• the set of all y-values

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}
• D:{0, 1, 2, -4}
  R:{1, -3, -4}
• D:{0, 1, 2, 3, 4}
  R:{1, -3, -4}

What is the range?

• the set of all x-values

• the set of all y-values