Answer:

Step-by-step explanation:
Given,  = (2, -5) and
 = (2, -5) and  = (8, 3)
 = (8, 3)
The slope formula is, 



 
        
             
        
        
        
Let x be the amount of cement and y be the amount of sand. If <span>the ratio of cement to sand for mortar is 1:3, then 

 and y=3x.
</span>
So, if <span>Sandy puts in x=7 shovels of cement, then she puts 

 shovels of sand.
</span><span>
</span><span>
Answer: 21 shovels of sand.
</span>
 
        
        
        
You can look at the graph and see where the point crosses the y - axis for the y-int and for the x-int you look to see where the point crosses the x-axis. The coordinate with always have a coordinate of zero. 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
2x is the slope which is just 2