Let "f(x)=y"
"\\therefore" "y=\\frac{5}{9}(x-32)"
"\\implies 9y=5x-160 \\implies9y+160=5x"
"\\implies x=\\frac{1}{5}(9y+160)" "=\\frac{9}{5}y+32"
Therefore the opposite function ,which convert Celsius to Fahrenheit is "\\frac{9}{5}y+32" ,where y is the temperature in Celsius. i,e,
"x\u00b0C,(\\frac{9}{5}x+32)\u00b0F"
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