documentclass[]{article}
usepackage[margin=0.5in]{geometry}
usepackage{pgfplots}
renewcommand{thesection}{arabic{section}}
usepackage{mathtools}
usepackage{cancel}
usepackage{pgfplots}
usepackage{amsmath}
setlengthparskip{0pt}
begin{center}}{end{center}}
begin{document}
textbf{Question 3} (10 marks)\[0.124cm]
begin{center}
begin{tikzpicture}[scale=0.8]
begin{axis}[
axis lines=middle,
grid=major,
minor tick num=4,
grid=both,
grid style={line width=.1pt, draw=gray!30},
major grid style={line width=.2pt,draw=gray!50},
xmin=0,
xmax=61,
ymin=0,
ymax=122,
height=14cm,
width=15cm,
xlabel=$textit{Time (minutes)}$,
ylabel=$textit{Cumulative Frequency}$,
xtick={0,5,10,15,20,25,30,35,40,45,50,55,60},
%symbolic x coords={0,5,10,15,20,25,30,35,40,45,50,55,60},
ytick={0,10,20,30,40,50,60,70,80,90,100,110,120},
%ylabel=textit{distance}text{ (cm)},
ylabel style={
anchor=south,
at={(ticklabel* cs:1.0)},
yshift=5pt
},
xlabel style={
anchor=west,
at={(ticklabel* cs:1.0)},
xshift=5pt
},
%xlabel=textit{t}text{ (s)},
%yticklabel style={
%fill=white,
%yshift=10pt,
%},
%xticklabel style={
%xshift=10pt,
%fill=white
%},
]
draw [thick] (axis cs:5,0) edge[bend right=30] (axis cs:40,60);
draw [thick] (axis cs:40,60) edge[bend left=10] (axis cs:60,120);
%
node [below] at (axis cs:-1,0) {$O$};
end{axis}
newline
end{tikzpicture}
end{center}
end{document}

documentclass[]{article}
usepackage[margin=0.5in]{geometry}
usepackage{pgfplots}
pgfplotsset{compat=1.16}
usepackage{amsmath}
setlengthparskip{0pt}
begin{document}
textbf{Question 3} (10 marks)\[0.124cm]
begin{center}
begin{tikzpicture}[scale=0.8]
begin{axis}[
axis lines=middle,
grid=major,
minor tick num=4,
grid=both,
grid style={line width=.1pt, draw=gray!30},
major grid style={line width=.2pt,draw=gray!50},
xmin=0,
xmax=61,
ymin=0,
ymax=122,
height=14cm,
width=15cm,
xlabel=$textit{Time (minutes)}$,
ylabel=$textit{Cumulative Frequency}$,
xtick={0,5,10,15,20,25,30,35,40,45,50,55,60},
%symbolic x coords={0,5,10,15,20,25,30,35,40,45,50,55,60},
ytick={0,10,20,30,40,50,60,70,80,90,100,110,120},
clip=false
%ylabel=textit{distance}text{ (cm)},
% ylabel style={
% anchor=south,
% at={(ticklabel* cs:1.0)},
% yshift=5pt
% },
% xlabel style={
% anchor=west,
% at={(ticklabel* cs:1.0)},
% xshift=5pt
% },
%xlabel=textit{t}text{ (s)},
%yticklabel style={
%fill=white,
%yshift=10pt,
%},
%xticklabel style={
%xshift=10pt,
%fill=white
%},
]
draw [thick] (axis cs:5,0) edge[bend right=30] (axis cs:40,60);
draw [thick] (axis cs:40,60) edge[bend left=10] (axis cs:60,120);
%
node [anchor=north] at (axis cs:0,0) {$O$};
end{axis}
end{tikzpicture}
end{center}
end{document}

documentclass[]{article}
usepackage[margin=0.5in]{geometry}
usepackage{pgfplots}
pgfplotsset{compat=1.16}
usepackage{amsmath}
setlengthparskip{0pt}
begin{document}
textbf{Question 3} (10 marks)\[0.124cm]
begin{center}
begin{tikzpicture}[scale=0.8]
begin{axis}[
axis lines=middle,
grid=major,
minor tick num=4,
grid=both,
grid style={line width=.1pt, draw=gray!30},
major grid style={line width=.2pt,draw=gray!50},
xmin=0,
xmax=61,
ymin=0,
ymax=122,
height=14cm,
width=15cm,
xlabel=$textit{Time (minutes)}$,
ylabel=$textit{Cumulative Frequency}$,
xtick={0,5,10,15,20,25,30,35,40,45,50,55,60},
%symbolic x coords={0,5,10,15,20,25,30,35,40,45,50,55,60},
ytick={0,10,20,30,40,50,60,70,80,90,100,110,120},
%ylabel=textit{distance}text{ (cm)},
% ylabel style={
% anchor=south,
% at={(ticklabel* cs:1.0)},
% yshift=5pt
% },
% xlabel style={
% anchor=west,
% at={(ticklabel* cs:1.0)},
% xshift=5pt
% },
%xlabel=textit{t}text{ (s)},
%yticklabel style={
%fill=white,
%yshift=10pt,
%},
%xticklabel style={
%xshift=10pt,
%fill=white
%},
]
draw [thick] (axis cs:5,0) edge[bend right=30] (axis cs:40,60);
draw [thick] (axis cs:40,60) edge[bend left=10] (axis cs:60,120);
%
end{axis}
node [anchor=north] at (0,0) {$O$};
end{tikzpicture}
end{center}
end{document}