[Interface]

То есть должно быть так:

Код:

if Radiobutton1.checked then
begin
Edit1.text:='1.3';
Image1.Picture.Graphic:= Image2.Picture.Graphic;
end;

if Radiobutton2.checked then
begin
Edit1.text:='2.5';
Image1.Picture.Graphic:= Image3.Picture.Graphic;
end;