Independent: number of hours
Dependent: Earned income
Domain: Between and including, 0 and 40 hours
Range: Between and including, 0 and 480$
        
             
        
        
        
To get the answer, you need to think of it like a see-saw.
Both sides must equal the same relative to 33.5. For example, 32 is 1.5 away from 33.5 so you could say you have 1.5*4 (because theres 4 tubes with 32 sweets). If you were to do this for the whole table, it would look something like this:

This simplifies to:




This method can sometimes be inefficient depending on how many values but is probably the simplest way to solve this problem.
hope this helps :)
(sorry the other way is kinda hard to explain possibly ask your teacher tomorrow)
 
        
        
        
Answer:
- Calculus texts: 600
- History texts: 0
- Marketing texts: 0
Step-by-step explanation:
Each Calculus text returns $10/2 = $5 per unit of shelf space. For History and Marketing texts, the respective numbers are $4/1 = $4 per unit, and $8/4 = $2 per unit. Using 1200 units of shelf space for 600 Calculus texts returns ...
   $5/unit × 1200 units = $6000 . . . profit
Any other use of units of shelf space will reduce profit.
 
        
             
        
        
        
1/2 -3/6 is equal to 0 because 1/2 is equal to 1/2