1) is the first answer and 2) is the last answer
        
                    
             
        
        
        
Answer:
It is a function. 
Step-by-step explanation:
Functions are relations in which one domain value is assigned to exactly one range value. The x-value must not repeat in the relation set for it to be a function. 
{(2,3), (4,3), (6,3), (5,9), (3,9)}
There are no repeating x-values given. 
The relation should be a function. 
Hope this helps. 
 
        
             
        
        
        
The equation that's illustrated simply depicts an investment as it shows the principal, and interest rate.
<h3>What is an investment?</h3>
It should be noted that an investment simply means a dedication of an asset in order to increase the value over a period of time. 
In this case, the equation that's illustrated simply depicts an investment as it shows the principal, and interest rate. To calculate the investment, the time, amount and rate will be considered.
Learn more about investment on:
brainly.com/question/25300925
#SPJ1
 
        
             
        
        
        
7/9 is the answer I believe