I was given, for the following function, find the derivative by definition and write the equation of the line tangent to the given function at the point where x=2.
Definition of a derivative of f(x): f'(x)=lim, h=0, [(f)x+h)-f(x)]/h
g(x)=2/3x-4
I understand how substituting in works(I think), what I don't know is how to do the math to follow through with the rest of the equation..