The function f(x) = 0 when the graph of the function intersects the x-axis. The graph of f(x) intersects the x-axis at x = 1. So the answer is C. 1.

The median is the middle value in a sorted, ascending or descending, list of numbers. Since we have a box plot, we can identify the median by looking at the middle line (the line that divides the box into two equal parts). The middle line in the box plot corresponds to a temperature of 42 degrees Fahrenheit. So the answer is B. 42.

The median is the middle value in a sorted, ascending or descending, list of numbers. Since we have a frequency table, we can create the sorted list by adding the frequencies together until we reach at least the middle value.

Value | Frequency | Cumulative Frequency
------- | -------- | --------
1 | 1 | 1
2 | 3 | 4
3 | 2 | 6
4 | 4 | 10
5 | 7 | 17

The median is the 9th value, which is 4. So the answer is C. 4

The graph shows a line that passes through the points (0, 0) and (4, 6). The slope of the line is:

m = (y2 - y1) / (x2 - x1) = (6 - 0) / (4 - 0) = 3/2
Therefore, the answer is B.

The P-intercept is the point where the graph crosses the P-axis. This happens when the sales S is zero. So, the P-intercept represents the least amount in thousand dollars that a salesman will receive in a month. So the answer is A.