To create a compound inequality that represents the phrase "all real numbers that are between -1 and 2," we need to use the symbols for inequalities and combine them properly.
Since we want the numbers between -1 and 2, we need to use the symbols for strict inequalities, which are "<" and ">."
The correct compound inequality is therefore C. -1 < n < 2.
To graph the solutions, we can plot the numbers on a number line. We'll mark -1 and 2 with open circles to indicate that they are not included in the solutions. Then, we'll shade the region between -1 and 2 to represent all real numbers between -1 and 2.
The correct graph is therefore the one that shows a shaded region between -1 and 2 on the number line.