what would the graph of y=.x look like? and for example when x=1, y=.1 when x=-123, y=-.123

Like this......https://www.desmos.com/calculator/rumjro4gci

I could be wrong but I think this question wants the graph obtained by mapping the number a*100+b*10+c, say, onto a/10+b/100+c/1000; or the number abc onto 0.abc  where a, b and c are single digits.  If so, then the following two graphs might help.  In the first the x-scale is linear, in the second it is logarithmic.

.