Question

The position of an object at time t is given by s(t) = -8 - 9t. Find the instantaneous velocity at t = 1 by finding the derivative.
Tell me if I did it right or not!

Answer 1

s(t) = -8 - 9t
f(x) = -8 - 9x
-8-9(x+h) - (-8-9x) / h
-8-9x-9h+8+9x / h
-9h/h
9

Answer 2

whooooops meant -9

Answer 3

good thing I posted this in the history section and not the math one...