Answer:
option A, C  and D
Step-by-step explanation:
Each relation is a function if each input has only one output
{a, 1), (6, 1), (C, 1)
This relation is a function because each input has only one output
{a, a),(a, b),(a, c)}
This relation is not a function because input 'a' has only three output
{(1, a), (2, a),(3, a)}
This relation is a function because each input has only one output
{a, a), (b, b), (C, c)}
This relation is a function because each input has only one output
 
        
             
        
        
        
Answer:
for the first picture:
1. 1
2. 0.8
3. 0.4
for the second picture:
2,256
srry if i needed to show the steps
 
        
                    
             
        
        
        
Answer:
1 litre
Step-by-step explanation:
When Joel left the house, his bottle was full.  He drank 5/8 of a litre, leaving 3/8 of a litre.  Add the two numbers together to find the total.
5/8 + 3/8 = 8/8 = 1