we are given
[tex]x-y=3[/tex]
Here , we are given
x as the independent variable
so, y is dependent variable
so, we will solve for y
[tex]x-y=3[/tex]
Add both sides by y
[tex]x-y+y=3+y[/tex]
[tex]x=3+y[/tex]
Subtract both sides by 3
[tex]x-3=3+y-3[/tex]
[tex]x-3=y[/tex]
so, our function is
[tex]f(x)=x-3[/tex]................Answer