Links to regentsprep.org direct/indirect variation

link to direct variation:
http://www.regentsprep.org/Regents/math/algtrig/ATE7/Direct%20Variation.htm

link to indirect variation:
http://www.regentsprep.org/Regents/math/algtrig/ATE7/Inverse%20Variation.htm

link to graphing rational equations:
http://www.regentsprep.org/Regents/math/algtrig/ATE11/RationalResource.htm

link to rational expressions:
http://www.regentsprep.org/Regents/math/algtrig/ATO2/indexATO2.htm