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10 cards from this deck
y=ax+bcx+dy = \frac{ax + b}{cx + d}y=cx+dax+b
Rectangular hyperbola
Set numerator equal to zero
Substitute x=0x = 0x=0
Set denominator equal to zero
Make xxx subject, set its denominator to zero
Lines the curve approaches but never touches
Sketch both functions and find intersections
Function is undefined at that value
Use large values like x=1000x = 1000x=1000 or x=−1000x = -1000x=−1000
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