-q-7q=8
First you need to know that there is an invisible 1 in front of -q. Change it to -q if you need to. You get:
-1q-7q=8
add like terms: -1-7 gives you -8.
-8q=8. Divide by -8 on both sides to find q. 
-8/8=-1
8/8=1 
Therefore, q=1.
        
             
        
        
        
Yes agree 10 percent is expected
        
             
        
        
        
-2 " -1,5 : -3-2 " -4/3 " -1 " 0 " 1 " 3/2 " 2
hv ju huy
        
                    
             
        
        
        
The slope is 7/8. 
Slope formula is the change in y over the change in x,
M=y2-y1 / x2-x1
M= -3 - (-10) / -2 - (-10)
Remember that two negatives equal a positive. 
That makes the equation:
M= -3 + 10 / -2 + 10
M= 7/8
        
             
        
        
        
It would be -25% !!!!!!!!