PART A:
 The generic equation of the line is: 
 y-yo = m (x-xo)
 First we look for the slope of the line:
 m = (y2-y1) / (x2-x1)
 m = ((5000) - (6000)) / (4-3)
 m = -1000
 Then, we substitute any point in the generic equation:
 (xo, yo) = (4, 5000)
 Substituting:
 y-5000 = (- 1000) (x-4)
 Rewriting:
 y = -1000x + 4000 + 5000
 y = -1000x + 9000
 The equation is:
 y = -1000x + 9000
 PART B: 
 For the price of 3.50 we have: 
 y = -1000 * (3.5) +9000
 y = 5500
        
             
        
        
        
Answer:432 whats the other option 4300
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$67.70
Step-by-step explanation:
Multiply 51.20 by 0.32 then add that to 51.20
 
        
             
        
        
        
Answer:
Center: (0, 0)
Radius: 4
Step-by-step explanation:
Circle Standard Equation: (x - h)² + (y - k)² = r²
(h, k) is center
r is radius
We see that our <em>h</em> and our <em>k</em> are both 0. 
∴ Our center is (0, 0), origin.
We see that our r² = 16
√r² = √16
∴ Our radius is equal to 4