Secant Line Slope and Tangent Line Slope

I have answered these problems already but I am not sure what the correct answers were.

Point P=(3,1/9) lies on 1/x^2

Find slope of secant line PQ for certain values of X:

X=2.5, mSecant=-.097778 <You may want to check the mSecant Val.

X=2.9, mSecant=-.077950 for the values.

X=2.99, mSecant=-.074446

X=2.999, mSecant=-.074111

X=3.5, mSecant=-.058957

X=3.1, mSecant=-.070528

X=3.01, mSecant=-.073705

X=3.001,mSecant=-.074037

b)Estimate the value of the slope of the tagent line at curve P. (use 2.999 and 3.001)

and

Using the slope from B find equation for tagent line to the curve at (3,1/9)