Answer:  2.25
Step-by-step explanation:
1 cm/ 2 in = x/ 4.5 in
2x = 4.5 in
4.5/2 = x
2.25 = x
 
        
             
        
        
        
To graph the equation, plot a few points then connect then with a line. 
f(x) = 440 - 55x
Plug in numbers for x to get the y value. 
f(0) = 440
f(1) = 385
f(2) = 330
f(3) = 275
f(4) = 220
f(5) = 165
So when you graph these points, the y intercept is y = 440 because the graph crosses the y axis at (0, 440). 
The x intercept is where the graph crosses the x axis. This happens when y = 0. 
0 = 440 - 55x. Solve for x. 
55x = 440
x = 8
So the x intercept is x = 8
        
             
        
        
        
There is more than one answer, but one could be: 
1024, 2.