What subject? Is it it could be for anything
        
             
        
        
        
Answer:
The horizontal rows/lines on the periodic table are called periods.
Explanation:
 
        
                    
             
        
        
        
The answers i got are in blue, if one value of x has more than one value of y it is not a function, otherwise it is
 
        
        
        
Answer:
<h2>C. To date rock layers</h2>
Explanation:
<em>They can help determine the relative age of rock layers</em>.
 
        
             
        
        
        
1. Topographic map: I want to take a nature hike through the woods. I wonder if it is hillly?
2. Geologic Map: I want to study the physical features of my area, but also know what kinds of rocks it has.
Those should be the answers.
Hope this helped :) Have a great day