急！如何在散点图上根据椭圆方程画椭圆？

请教大牛！如何在y对x的散点图上根据椭圆方程画椭圆？

椭圆方程：0.198x^2+0.069y^2-0.041xy-22.309x+2.239y=-623.796

万分感谢！
数据：
data ty;
  input id x y;
cards;
1 55 -6
2 54 -2
3 57.5 3
4 57 6
5 59 0
6 59.5 -1
7 58 -2
8 55.5 -5
9 53 2
;
run;

I made the plot based on my understanding to your question.jingju
http://blog.sina.com.cn/s/blog_a3a926360101jt5g.html

jingju11 发表于 2014-4-26 23:53
I made the plot based on my understanding to your question.jingju
http://blog.sina.com.cn/s/blog_a3 ...

大牛，膜拜~