[Solved] Graph the function using a graphing utility and the Change-of-Base Formula. -\[\begin{array}{l} y = \log _ { 12 } x\\ \end{array}\] Margin Call: A demand by a broker that an investor deposit additional money or securities to cover possible losses. Initial Margin: The minimum amount of equity that must be provided by an investor when purchasing securities on margin, acting as a down payment on the purchase. Maintenance Margin: The minimum amount of equity that must be maintained in a margin account to continue holding an investment, after initiating a position. Margin Call: A demand by a broker that an investor deposit further cash or securities to cover possible losses in a margin account.