Let's say x is the amount of money Kelly saves.  We do not know how many weeks she is saving.  If she was saving for 2, then the equation would be x=5(2).  However, she is saving by w weeks, so the equation is x=5w.
        
             
        
        
        
The GCF is 1. There is no other number that those numbers have in common.
Hope this helps!!
        
                    
             
        
        
        
Answer:
y = 1/3x + 5/3 
Step-by-step explanation:
An equation contains a slope and y-intercept, in the form y = mx + b. To find the slope or m, you need to plug the coordinates into the slope formula. 
y2 - y1/ x2 - 1
3 - 0/ 4 - (-5)
= 3 / 9
= 1/3
Now that we know the slope, we need to plug the values of x and y to find the y-intercept. 
y = 1/3x + b
3 = 1/3(4) + b
3 = 4/3 + b
5/3 = b 
The equation is y = 1/3x + 5/3