A projectile is fired vertically upward and has a position g

A projectile is fired vertically upward and has a position given by s(t)=-16T^2+320t+336 for 0 less than or equal t less than or equal 21.

C. Confirm your answer to part b (10) by completing the table of values below.
Interval (10,10.5) (10,10.1) (10,10.01) (10,10.001) (10,10.0001)
Slope of secant line ______ ______ _______ _________ __________