Line and Circle Intersection

Hello I could really use some from help from all the python programming wizards.
Create a Line and Circle intersection program.
1.Ask user to enter the slope and y-intercept of a line.
2.Ask the user to enter the radius of a circle.
3.Ask the user to enter the x and y values of the center of the circle.
4.Output the two intersection points between the line and circle
If there is not an intersection, output “No Solution.”
5.Ask the user to enter yes or no. If they enter yes, the  program is to restart. If they
enter no, the program is to terminate.
I just want to know were I should start.
Thanks

I just want to know were I should start.


$ vim prog.py
a#/usr/bin/env python
print "hello"
<ESC><C-Z>chmod +x prog.y
$ ./prog.py
hello
$ fg <CR>


here you go