1:
2:

g.ScaleTransform(1, -1); // y-Achse umkehren
g.TranslateTransform(255, 255);					

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Funktionsberechnung
{
    public partial class Linear : Form
    {
        public Linear()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Hilfe help = new Hilfe();
            help.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
            decimal pm = mNum.Value;
            decimal pn = nNum.Value;
            int ver = 250;
            decimal start;
            decimal end;
            start = (pm * 100 + pn);
            end =  (pm * 200 + pn);
            int st = Convert.ToInt16(start);
            int en = Convert.ToInt16(end);
            Graphics line = this.CreateGraphics();
            line.DrawLine(new Pen(Brushes.Black), st,100, en, 200);
        }
    }
}