Answer:
A function is a pre-programmed calculation, whereas a formula is a user-defined calculation. A single function could be used in a formula.
Step-by-step explanation:
if you add =AVERAGE(A1:A56), that is a formula, using the AVERAGE function. If you enter =SUM(G4+A5) - 25 * MIN(B3:B6), that is a formula which uses both the SUM function and the MIN function, as well as standard mathematical operators (-, +, *).