The distance between -7 and 2 on the number line?

The distance between -7 and 2 on the number line can be calculated by taking the absolute value of the difference between the two numbers. This is done by subtracting -7 from 2, which gives us 2 - (-7) = 2 + 7 = 9. Therefore, the distance between -7 and 2 is 9 units.