How is speed of metabolism determined?

1) Your age
2) Your Gender
3) your activity level
Calculate how often you exercise and use this BMR

MEN: 66+(6.23* weight in pounds) +(12.7* height in inches) - (6.76* age in years)

WOMEN: 655+ (4.35* weight in pounds ) + (4.7* height in inches) - (4.7* age in years)

I Hope this helps ;)

Thats a weird question but ill answer it i think 5.