•https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Function_color_example_3.svg/2000px-Function_color_example_3.svg.png
•http://image.slidesharecdn.com/functionvsnotfunction-100804230457-phpapp02/95/function-vs-not-function-4-728.jpg?cb=1280963141
•https://classes.lt.unt.edu/Spring_2010/CECS_5420_020/lao0041/Assign%205/graph.html•https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Function_color_example_3.svg/2000px-Function_color_example_3.svg.png
•http://image.slidesharecdn.com/functionvsnotfunction-100804230457-phpapp02/95/function-vs-not-function-4-728.jpg?cb=1280963141
•https://classes.lt.unt.edu/Spring_2010/CECS_5420_020/lao0041/Assign%205/graph.html
•http://image.slidesharecdn.com/functionvsnotfunction-100804230457-phpapp02/95/function-vs-not-function-4-728.jpg?cb=1280963141
•https://classes.lt.unt.edu/Spring_2010/CECS_5420_020/lao0041/Assign%205/graph.html•https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Function_color_example_3.svg/2000px-Function_color_example_3.svg.png
•http://image.slidesharecdn.com/functionvsnotfunction-100804230457-phpapp02/95/function-vs-not-function-4-728.jpg?cb=1280963141
•https://classes.lt.unt.edu/Spring_2010/CECS_5420_020/lao0041/Assign%205/graph.html