Create function loading data from a cell

Hello, I am creating a function where I load data from a cell. I give different parameters (a,b,c) each time, like function Function_Plot(a,b,c) From these data I need only the last point, meaning, for each a,b,c I will take just one number. At the end I need a plot (line curve) with the different points. - Can I give a range of values for each of the parameters a, b and c? - Can I store each of the numbers for the final curve I need? Thanks in advance for your reply. Best regards, Araceli