Your answer is c. If you are struggling divide to backtrack and that should help you get to the answer.
        
             
        
        
        
Answer:
points A, B and D are all in the same plane but not all are on the same line
Step-by-step explanation:
points A, C, D are all collinear which means they must also be coplanar
 
        
             
        
        
        
We know that Ava is paying $2 dollars per week so if L is the money that she owes and t is the number of weeks, and I is the initial debt so we can write an equation like:

Now we can replace the info we have to find the value of I so:

and we solve for I

So the final equation will be:
 
 
        
             
        
        
        
The number is -45 (negative 45)