The IIT JEE Maths test series graph represent a comparative study on the gravity of questions coming in each year. The blue bar indicates questions coming in year 2015, red one stands for questions in 2014 and orange bar shows questions in 2006 onwards.
As clearly indicated that maximum number of questions came from the chapter Algebra where gravity of question was high in 2014 and is expected to be so in 2015. The student must have formulae and answers at the back of their hand for this chapter.
From differential calculus questions were maximum in 2014 but are estimated to drop in 2015. It s important to note that for integral calculus the gravity of questions were less in 2014 as compared to the estimated amount in 2015 where it will rise.
Vector and 3D geometry graph shows that more questions are expected from this chapter in 2015 as compared to 2014. For Coordinate geometry too more questions are expected next year ie 2015 in comparison to 2014. Trigonometry has the smallest graph through which one can infer that least gravity of question will come from this chapter. IIT Maths online test practice is what will get you those super grades.