I have these points of a line:

(100, 6.5) (110, 5.9) (120, 5.4) (130, 5.0) (140, 4.6) (150, 4.3) (160, 4.1)

together, they form a curved line, so the slope is inconsistant

I need the equation of this line....i think it is a hyperbola, so it may possibly have something to do with the equation y=1/x...thanks