I believe the answers would be b. and c.
        
             
        
        
        
Answer:
Gradient of line A = 4
Gradient of line B = -2
Step-by-step explanation:
To solve this question, we will use the formula for gradient passing through two points  and
 and  ,
,
Gradient (m) = 
For line A,
Since, line A passes through (3, 6) and (4, 10)
Gradient of line A = 
                               = 4
For line B,
Since, line B passes through (1, 6) and (2, 4),
Gradient of line B = 
                              = -2
 
        
             
        
        
        
Answer:
24 so 4th answer
Step-by-step explanation:
Hope this helps