How can I tell the user what type of graph has been produced from his/her input?

Type of graph such as linear graph, etc.,

Here is my code and I have no idea how to make a program that satisfies my question above. Can anyone help?

n2=input('\nHow many values of time do you have?: ');                      %The n2 variable represents the number of time [in seconds] to complete a cycle
                                                                           %and the corresponding frequencies, which the user will enter                 
for i=1:n2; 
    disp(' ') 
    tm(i)=input('Enter the value of your time [in seconds]: ');            %The w(i) variable represents the values of the wavelength                                                                                                                       
    disp(' ')
    fre(i)=input('Enter the value of your frequencies: ');                 %The fre(i) variable represents the values of the frequency
  
                                                                           
nocc=@(tm,fre)tm.*fre;                                                     %The nocc variable represents the name of the anonymous function together 
                                                                           %with the list of the arguments 
                                                                           %formula for the Number of Complete Cycles emitted in a certain time interval
results=nocc(tm,fre);

end

fprintf('\nHere are the calculated results:\n');
fprintf('\tTime [in seconds] \t   Frequencies \t    Number of Completed Cycles\n');
fprintf('\t  %2.4f s \t\t %4.4f cycle/s \t  %6.0f cycles\n',[tm;fre;results])

time=tm';                                                                  %The time variable represents the location for the transposed row vector of the time                                                             
freqq=fre';                                                                %The freqq variable represents the location for the transposed row vector of the frequenct
cycle=results';                                                            %The cycle variable represents the location for the transposed row vector 
                                                                           %of the Number of Cycles

%This part is only necessary for making an excel file from the output                                                                          
T = array2table([time(:),freqq(:),cycle(:)], 'VariableNames', {'Time to complete a Cycle','Frequency','Number of Cycles'});
writetable(T, 'cycles.xls')

plot(tm,fre), xlabel('Frequency'), ylabel('Number of Cycles'),title('Number of Cycles vs Frequency Graph')