Question

The position of an object at time t is given by s(t) = -9 - 3t. Find the instantaneous velocity at t = 8 by finding the derivative.

Answer 1

do you know how to find the derivative of -9 - 3t?

Answer 2

yes its -3 but what do i do to find instant velocity

Answer 3

the velocity is just -3

Answer 4

-3 means that the velocity is always -3 no matter what t is

Answer 5

think of it this way: if we graph y = -9 - 3t we get a straight line, meaning that the speed is a constant

Answer 6

so the velocity is constant derivative -3

Answer 7

yes

Answer 8

alright thank you