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Annotation of loncom/html/adm/help/tex/Numerical_Response_Advanced_Example.tex, revision 1.4

1.2       bowersj2    1: \label{Numerical_Response_Advanced_Example}
1.1       bowersj2    2: 
                      3: %
                      4: \begin{figure}
                      5: \begin{center}\includegraphics[  width=0.80\paperwidth]{numericalResponseSlopeProblem}\end{center}
                      6: 
                      7: 
                      8: \caption{Slope Problem Parameters\label{Slope Problem Parameters Figure}}
                      9: \end{figure}
1.4     ! lira       10: Now you have all the tools to create those wonderful dynamic, randomized problems that you've seen in 
        !            11: LON-CAPA. Consider a Numerical Response problem where the equations for two lines are randomly generated 
        !            12: and the students are asked to find the intercept. Try filling out your problem with the parameters shown 
        !            13: in Figure \ref{Slope Problem Parameters Figure}.. 
1.1       bowersj2   14: 
                     15: When creating randomized problems, you want to make sure that the problems
1.3       vandui11   16: always have an answer. Consider what might happen if two
                     17: slopes are chosen, \emph{both} with the expression \texttt{\&random(-1.0,1.0,.2)}. One
1.1       bowersj2   18: out of ten students would get a problem where both slopes were equal, which
                     19: has either no solution (for unequal y-intercepts) or an infinite number of
                     20: solutions (for equal slopes and y-intercepts). Both of these cause a division-by-zero
                     21: error on the division that computes the answer. There are many ways to avoid
                     22: this, one of the easiest of which is picking one slope negative and one positive.
1.3       vandui11   23: This same problem can show up in many other places as well, so be careful.