Can you find me a website how to do inequalities on line graphs on the less than and greater than inequalities. Ex:
2r-2<4 (A line goes under the sign "<")
Try these sites.
https://www.khanacademy.org/math/algebra/linear_inequalities/inequalities/e/inequalities_on_a_number_line
http://www.mathwarehouse.com/number-lines/graph-inequality-on-number-line.php
http://www.webmath.com/plotineq.html