The main difference between the two equations is the addition of the constant term -4 in Equation A. This term shifts the graph of the function downwards by 4 units compared to the graph of f(x)=x. Essentially, the transformation represented by Equation A stretches the original function by a factor of 3 and shifts it downward by 4 units. This results in a steeper, shifted version of the original linear function f(x)=x.
