Question

Very fast need help pls

Answer 1

1. Not a function
Domain and Range not applicable

2. Function
Domain: [0, 10]
Range: [-18, 12]

3. Function
Domain: [1, 4]
Range: [12, 18]

4. Function
Domain: [-4, 5]
Range: [-3, 4]

5-7 your answers are right

5. Function

6. Not a function

7. Function

Explanation: