Formula :
Difference quotient = (f(x+h)-f(x))/h
Example:
Find the difference quotient of 12x + 4
Step 1 :
f(x+h) = 12(x+h) + 4
Step 2 :
f(x) = 12x+4
Step 3 :
12(x+h) + 4 - (12x+4)
=12x + 12h +4 - 12x - 4
=12h
Step 4 :
12h / h = 12
Hence 12 is the difference quotient.
