Use the four-step process to find the slope of the tangent line to the graph of the given function at any point. (Simplify your answers completely.)
f(x) = 6 − 2x

Step 1:
f(x + h)
=
Step 2:
f(x + h) − f(x)
=

Step 3:
f(x + h) − f(x)
h
=

Step 4:
f '(x) =
lim
h→0
f(x + h) − f(x)
h
=