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我怎样才能将该图形变成反比例函数的形式？

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我怎样才能将该图形变成反比例函数的形式？

我编写了这段代码来绘制 NTC 电阻器随温度变化的电阻图。我知道它具有反比形式，但我无法让它绘制出这样一种图，即不经过每个点，而是保持反比函数的形式。我该如何改变它以使其具有这种形式？

%\usepackage{pgfplots}

\begin{center}

\begin{tikzpicture}

\begin{axis}[
title={\textbf{Grafiek 1 aan de hand van \textit{Tabel 2}}},
xlabel = {$T$($^\circ$C)},
ylabel = {$R_{\mathrm{NTC}}$},
xmin = 20, xmax = 72,
ymin = 0, ymax = 50,
xtick = {0,10,20,30,40,50,60,70,80},
ytick = {0,10,20,30,40,50,60,70,80},
ymajorgrids = true,
grid style = dashed,
]


\addplot[ 
color = blue,
mark = *,
smooth, 
]
coordinates {
(22,49.9)(25,45.5)(28,41.1)(33,36.2)(36,31.6)(40,28.6)(45,23.7)(48,21.6)
(51,20.5)(55,18.1)(58,16.5)(63,14.9)(72,10.8)};

\end{axis}
\end{tikzpicture}
\end{center}

答案1

在此处输入图片描述

\documentclass[margin=3mm]{standalone}
\usepackage{siunitx}
\usepackage{pgfplots}
\pgfplotsset{width=8cm,compat=1.14}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
title={\textbf{Grafiek 1 aan de hand van \textit{Tabel 2}}},
xlabel = {$T$ (\si{\degreeCelsius})},
ylabel = {$R_{\mathrm{NTC}}$},
xmin = 20, xmax = 80,
ymin = 0, ymax = 50,
ymajorgrids = true,
grid style = dashed,
]

\addplot[blue, 
     domain=20:80,          %   <-- added 
     samples=7,             %   <-- added 
     mark = *, 
     smooth] 
     {1000/x};              %   <-- changed
 \end{axis}

\end{tikzpicture}
\end{document}

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