Mister Exam

y=(ax+b)/(cx+d) canonical form

The teacher will be very surprised to see your correct solution 😉

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The solution

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    b + a*x    
y - ------- = 0
    d + c*x    
$$y - \frac{a x + b}{c x + d} = 0$$
y - (a*x + b)/(c*x + d) = 0