1 The graph of any quadratic equation is a parabola.  All parabolas have an axis of symmetry and the point at which the axis of symmetry intersects the parabola is called the vertex of the parabola and the vertex lies half way between the focus and the directrix.
As far as weight, Clarkson weighs around 165 pounds currently. She has lost weight in the past weighing in at around 145 pounds. Nutrition is always on Kellyâs mind amidst her busy lifestyle of singing and taking the time to help others. It is unknown if Kelly Clarkson participates in daily exercise. She does stay active which is one step in the right direction for overall health.
Photo: NBC/NBCU. 'Biggest Loser' Rachel Frederickson has revealed just how she managed to lose 155 pounds. This seasonâs Biggest Loser winner Rachel Frederickson lost a staggering 155 pounds while on the show, and sheâs now spilling her diet and exercise secrets! She arrived weighing 260 pounds and stunned trainers Bob Harper and Jillian Michaels with her super skinny appearance at the finale.