do you have picture on how you want it

anything related to plot can be changed with plot function like marker, line types width and so on

Mariam Qutiaba thank you sor your answer. The below figure show that the exact plot . The point connecting showing line. I want to connect these points using a curve instead of a line graph for good representation.

You may try interpolation methods

these points are random distributed and do not fallow specific behavior (increasing or decreasing) you can take the mean value or average