Math is not a gene, but a skill honed over time by hard work.
Helpful Website:
http://www.ixl.com/math/practice/grade-8-graph-a-line-from-an-equation
~ interactive website to practice graphing a line
http://www.brightstorm.com/d/math
~ videos of topics covered in class by a classroom teacher. (free website, login required)
http://www.khanacademy.org/
~ videos of topics covered in class. (free website, login not required)
http://mathletics.com
~ interactive website to learn and reinforce math concepts. (free website, login required)
http://www.coolmath.com
~ notes on math concepts. (free website)
You should read each section under Math Survival - It would be helpful to download and print section 7 How to be a successful student and section 8 How to study for a math test.