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A hyperbola has asymptotes  
\[x=\frac{3}{2}, \: y=4\]
  and passes through the point  
\[(2,1)\]
.
How can we find the equation of the asymptote?

finding equation of hyperbola from asymptotes and point on curve

The equation of a hyperbola can be written in the form  
\[(x-x_0)(y-y_0)=k\]
  where  
\[x=x_0, \: y=y_0\]
  are the equations of the hyperbolae and  
\[k\]
  is a constant.
Hence we can write  
\[(x- \frac{3}{2})(y-4)=k\]
.
To find the value of  
\[k\]
  substitute the equation of a point on the curve.
 
\[((2- \frac{3}{2})(1-4)=k \rightarrow k=- \frac{3}{2}\]
.
The equation of the hyperbola is  
\[(x- \frac{3}{2})(y-4)=- \frac{3}{2}\]
.
We can write this as  
\[y-4=\frac{-3/2}{x-3/2} \rightarrow y= \frac{-3/2}{x-3/2} +4=\frac{-3/2+4(x-3/2)}{x-3/2}=\frac{4x-15/2}{x-3/2}=\frac{8x-15}{2x-3}\]

We can write this as  
\[y-4=\frac{-3/2}{x-3/2} \rightarrow y= \frac{-3/2}{x-3/2} +4=\frac{-3/2+4(x-3/2)}{x-3/2}=\frac{4x-15/2}{x-3/2}=\frac{8x-15}{2x-3}\]