Answer 
The equation is already in slope intercept form so just graph it as you normally would.
Step-by-step explanation:
graph the -3x as a line the looks like this \ that goes through the +60. It should look like this 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Use the formule V=4/3 *Pi*R^3
where R =10 
so V=4/3*Pi*10^3
v= 4000Pi/3 =4188.7902
 
        
             
        
        
        
-20+1= -19
-19/2= -9.5
Check:
-9.5x2= -19
-19-1= -20