Question 527651
1. y= x+4 over 2 
2. y=-1/2x + 2 
3. Y=2x-3 
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To find the inverse(y^-1) of a one-to-one function, interchange x and y and solve for y:
1. y= x+4 over 2
x=(y+4)/2
2x=y+4
y^-1=2x-4 
..
2. y=-1/2x + 2 
x=-y/2+2
2x=-y+4
y^-1=-2x+4
..
3. Y=2x-3
x=2y-3
2y=x+3
y^-1=(x+3)/2