Final answer:
The midpoint between -100 and -95 is found by averaging the two numbers, resulting in a midpoint of -97.5 on the number line. The correct answer is option A).
Step-by-step explanation:
The question asks for the coordinate of the midpoint between two points on a number line, specifically -100 and -95. To find the midpoint, you simply need to take the average of the two numbers. This is the sum of the numbers divided by two. In mathematical terms, the midpoint M is given by M = (x1 + x2) / 2, where x1 and x2 are the coordinates of the two points.
Using this formula: M = (-100 + -95) / 2. M = (-195) / 2. M = -97.5. Therefore, the midpoint is at -97.5 on the number line, which corresponds to option A). Therefore, the coordinate of the midpoint between -100 and -95 on the number line is -97.5.