The graphs of y = f(x) and y = a*f(x) when a = 1 are identical.
No. It depends on the function f.
yfx
1. Personal contributions of partners. 2. Funds from financial institutions (usually as loans and overdrafts). 3. Trade credit. 4. Retained earnings/Ploughed back profits - These are profits of the business which are kept back that can be put into the business where the need arises. These profits are important sources of capital.