Answer:
9) y = -3x - 4
10) y = -1/3x + 14/3
11) y = x - 1
12) y = -7/5x - 18/5
13) y = 3/5x + 9/5
14) y = -2x - 3
Step-by-step explanation:
For this explanation, let's use the last problem as the example. You would use the formula y=mx+b. The first thing you would need to find would be the slope, or m. So, you would find the slope and conclude the answer is -2. After that, you would solve for b and get the answer. Hope this helped! 
 
        
             
        
        
        
Answer:
7/2, 3.5 (depending on which form you want it in)
Step-by-step explanation:
Looking at the numbers on the side, lets take two points they already gave us.
It goes up 14, and over 4 from 0,0.
14/4 Simplify.
7/2
7/2 is your slope
Note:
For those asking why it isn't "10/3" or anything else, It's because we can't be sure the line crosses that coordinate at that point. So lets just take two points where we know the actual coordinates, and derive the slope from that because it's more accurate.
 
        
                    
             
        
        
        
Answer:
Answer would be 89/100
Step-by-step explanation:
 
        
             
        
        
        
The slope of (14,12) and (35,30) is:
m= 6/7