When you know the slope
and a point
of a line, the equation of the line is given by

So, your line is given by

4
---------------------------------
100:16=6R4
As the question stands, none of the choices is a correct answer.
In the question, I'm pretty sure there's supposed to be something in
the space between the words "worker took ... of the bags".
If "one eighth" or " 1/8 ", is stuffed into that space, then each pile
contains (1/4 of 1/8) of the entire load. That's 1/32 of it.