Question

Explain why the distance from 0 to -7 is the
same as the distance from 0 to 7.​

Answer 1

The distance between two number is the absolute value of their difference. So, we have

$d(0, 7) = |0-(7)| = |-7| = 7$

$d(0, -7) = |0-(-7)| = |7| = 7$