With a line of credit, the total size of the credit line can increase if the interest rate decreases. (debt.org)
Based on those numbers, the Merrill representative gave Holland --- on that same day --- an estimate on the size of the credit line Merrill could offer. (inc.com)
With a secured credit card, your credit line depends more on your security deposit — effectively, you have more control on the size of your credit line. (mybanktracker.com)