We've made many improvements to our graphing interface over the past month. All of these changes work with individual as well as our Co-Lab groups assignments, and also save with the student response, so that instructors will be able to see all of the customizations a student made to a graph.
Custom axes titles
Now when selecting which column to plot, you have the choice to override the automatic axis titles, and write your own custom title.
You can toggle a legend for the graph using the cog menu. This legend will include the names of all of the columns in the graph as well as any curve fits.
Saving selected points
You can now select points to use in a curve fit before you select the curve fit. The selections are saved to the graph object, so all students in the group will also see your selection. A student's point selection is also saved to the graph object, so that instructors can see the points a student selected to make a fit, and instructors can pre-select points a pre-populated graph for students as well. If you ever want to switch your selection back to all the available points in the graph, you can click Select All Points next to the cog menu.
We now offer a connect-the-dots line graph as a graph option in the cog menu
Improved inverse curve fits
Previously, the graphing tool drew inverse and inverse square curve fits over the entire domain, which produced some strange results when crossing vertical asymptotes. Since almost data students measure in the lab that fits an inverse function will be restricted to a single quadrant, we now first determine which quadrant the data is in, and then only plot curve fit data in that same quadrant. This results in inverse fits that look more like what one would expect.