Answer :
the distance between 0 and on the no. line -10 = 10 units
the distance between 0 and 7on the no. line = 7 units
the distance between 0 and 3 on the no. line = 3 units
the distance between 0 and -2 on the no. line = 2 units
therefore -2 is closest to 0 on the no. line
the distance between 0 and 7on the no. line = 7 units
the distance between 0 and 3 on the no. line = 3 units
the distance between 0 and -2 on the no. line = 2 units
therefore -2 is closest to 0 on the no. line