Without additional information, we cannot determine whether Liam or Maureen is correct. However, we can answer the second question.
The y-intercept of the graph represents the price per ticket when no tickets are purchased. In other words, it is the value of the dependent variable (price per ticket) when the independent variable (number of tickets purchased) is zero.
If we assume that the price per ticket is a constant value regardless of the number of tickets purchased, then the y-intercept of the graph would be the price per ticket. For example, if the price per ticket is $5, then the y-intercept of the graph would be (0, 5). This means that if no tickets are purchased, the price per ticket is $5.
However, if the price per ticket decreases as more tickets are purchased, then the y-intercept of the graph would not represent the price per ticket. Instead, it would represent the minimum price per ticket when a large number of tickets are purchased. In this case, the y-intercept would not have a meaningful interpretation in terms of the problem situation.
Therefore, without additional information, we cannot determine the y-intercept of the graph or its interpretation in the problem situation.