Answer:1.5
 + 15
 ————
 2.25r
Step-by-step explanation:
You can try that!
 
        
             
        
        
        
Answer:
The answer is 4
Step-by-step explanation:
 
        
             
        
        
        
Answer:
(3) Jonah's graph has a steeper slope than Rowan's
Step-by-step explanation:
First we are going to write the equations for the amount of money that each one save 
y = a+bx
  Where y: Amount of money in the jar
              a: Initial saving
              b: Money saved every week ( graph's slope )
              x: Number of week 
Then, for Rowan
y = 50 + 5x
and for Jonah
y = 10 + 15x
Initially Rowan's graph lies above Jonah's graph but this situation change with time. 
It is always true that Jonah's graph has a steeper slope than Rowan's, because for Rowan's graph the slope is 5 and for Jonah's graph the slope is 15
Then the answer is:  
(3) Jonah's graph has a steeper slope than Rowan's