Final answer:
The maximum bound of the left vertical axis in the context of the provided scales and values is 10,000,000. This is based on a logarithmic scale where each step represents a power of 10, and 10,000,000 is the greatest power of ten less than the highest given value.
Step-by-step explanation:
The question refers to identifying the maximum bound of the left vertical axis on a given scale. Based on the provided number sequences, it seems that we're dealing with a sequence of numerical values that represent a scale on the left vertical axis, potentially in a graph of some sort. If we consider that the values provided (10,000 to 160,000 and 11,978,450 to 12,442,373) correspond to a logarithmic scale where each numbered interval represents a factor of 10, then the maximum bound would be calculated by the highest power of 10 that is less than or equal to the greatest value in the sequence, which, in this case, is 12,442,373.
Therefore, the maximum bound of the left vertical axis would be 10,000,000 because this is the greatest power of 10 less than or equal to the highest value given. The option that would match would then be 1) 10,000,000. This presumes that the values increase in uniform logarithmic increments as typically found on a logarithmic scale, where each step is a factor of 10 (i.e., 104, 105, 106, etc.).