Ok. Could I have a picture of the question? :)
        
             
        
        
        
Step-by-step explanation:
 
        
             
        
        
        
As you can see in this diagram, the answer is A, the ten-thousands place.
 
        
        
        
Point-slope form of a line: We need a point (x₀,y₀) and the slope "m";
y-y₀=m(x-x₀)
We have the next equation of line:
y=1/2 x-2  (slope-intercept form y=mx+b)
the slope of this line is 1/2  (m=1/2)
And any one point could be:
if x=0; then y=1/2 (0)-2=-2  (0,-2)
Therefore, we already have the point (0-,2) and the slope (m=1/2)
y-y₀=m(x-x₀)
y+2=1/2(x-0)
Answer: the point slope form of y=1/2 x-2; would be:
y+2=1/2(x-0)