The y intercept is where the line hits the verticals line of the graph. Hope this helps!
 
        
        
        
Answer:
y=3x+13
Step-by-step explanation:
 
        
             
        
        
        
Answer: 115 - (-30) = 115 + 30 = 145 degrees change
Step-by-step explanation:
 
        
             
        
        
        
Answer:
   closure
Step-by-step explanation:
The property is actually a property <em>of the set of polynomials</em>, rather than a property of <em>multiplication</em>.
The set of polynomials is closed under the operation of multiplication. We call that property <em>closure</em>.