Match each graph with its equation.
  •  
  •  
  •  
  •  
  1. y=x2x1\displaystyle {y}=\frac{{{x}-{2}}}{{{x}-{1}}}
  2. y=(x2)2(x1)2\displaystyle {y}=\frac{{\left({x}-{2}\right)}^{{2}}}{{\left({x}-{1}\right)}^{{2}}}
  3. y=(x2)2x1\displaystyle {y}=\frac{{\left({x}-{2}\right)}^{{2}}}{{{x}-{1}}}
  4. y=x2(x1)2\displaystyle {y}=\frac{{{x}-{2}}}{{\left({x}-{1}\right)}^{{2}}}