--- loncom/html/adm/help/tex/Numerical_Response_Advanced_Example.tex 2002/07/18 15:52:27 1.2 +++ loncom/html/adm/help/tex/Numerical_Response_Advanced_Example.tex 2005/02/15 14:59:30 1.3 @@ -11,11 +11,11 @@ Problem Parameters'' figure. When creating randomized problems, you want to make sure that the problems -always have an answer. Consider what might happen if I had chosen the two -slopes \emph{both} with the expression \texttt{\&random(-1.0,1.0,.2)}. One +always have an answer. Consider what might happen if two +slopes are chosen, \emph{both} with the expression \texttt{\&random(-1.0,1.0,.2)}. One out of ten students would get a problem where both slopes were equal, which has either no solution (for unequal y-intercepts) or an infinite number of solutions (for equal slopes and y-intercepts). Both of these cause a division-by-zero error on the division that computes the answer. There are many ways to avoid this, one of the easiest of which is picking one slope negative and one positive. -This same problem can show up in many other places, too, so be careful. +This same problem can show up in many other places as well, so be careful.