we have that
A is at -3
B is at 3
so
segment AB=3-(-3)=6 units
we have that
C is 1/3 of the way from A to B
Multiply 1/3 by the length of segment AB
so
(1/3)6=2 units
Find the coordinate of point C
Adds 2 units to the coordinate of point A
-3+2=-1
therefore
C is at -1