\(p(x)=\dfrac{500}{x+10}-5 \)
\(y=\dfrac{500}{x+10}-5~~~~~|+5 \)
\(y+5=\dfrac{500}{x+10}~~~~~|\text{Kehrwert} \)
\(\dfrac{1}{y+5}=\dfrac{x+10}{500}~~~~~|\cdot 500 \)
\(\dfrac{500}{y+5}=x+10 ~~~~~~|-10\)
\(\dfrac{500}{y+5}-10=x~~~~~| x\leftrightarrow y \)
\(\bar p(x)=\dfrac{500}{x+5}-10\)