We want to find the axis of symmetry of the function;

STEP 1:
The equation for the axis of symmetry of a line is given as;

From the equation, a = 6 and b = -3, so, 
STEP 2: Insert the values of a and b into the equation to obtain;

CONCLUSION:
Therefore, we see that the axis of symmetry is the line;
 
 
        
             
        
        
        
A1. 12 i.e option D
A2. 3n-7 i.e option A
A3. -6n+20 i.e option D
A4. -70 i.e option C
Step-by-step explanation:
aₙ = a₁ + (n - 1) × d  
aₙ	=	the nᵗʰ term in the sequence
a₁	=	the first term in the sequence
d	=	the common difference between terms
Using the above formula to solve the first part, we have :
For the second part, we have :
For the third part, we have : 
For the fourth part, we have :
 
        
             
        
        
        
Answer:
145 degrees
Explanation:
A straight line is 180 degrees so minus 180 by 35 to get 145 degrees. 
 
        
                    
             
        
        
        
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Its 6 I think hope this helps