I am hopelessly lost in all of this, but I feel like there should be a way to do what I want… Here’s my Work In Progress: https://teacher.desmos.com/activitybuilder/custom/5e9f5198762da1796f45598e I would like to check if the values students enter into the table on the last screen really are solut…

Try checking out some of this thread… [image] Help with checking for correctness Questions Slide 14 could be done similarly to slide 5. Here’s my solution for slide 15, in the table CL: eq1=parseEquation(this.cellContent(1,1)).differenceFunction(“x”,“y”) eq2=parseEquat…

I have used a template posted for checking values in a table. Every example has integer values assigned to the answer variable. How do I assign an irrational number or for that matter a negative fraction to the answer checking cell?

You mean the parameters in evaluateAt() if I’m understanding correctly. You can use numericValue to directly calculate something as a parameter. You can also use variables you create, which is less messy. Just be careful with irrational and non-terminating variables. You’ll always want to round. Say…

Thanks but what I want to do is check whether an irrational number value entered by a student in a table is the correct answer. For instance in the code you posted for “table based automatic checking” your example checks answer1=1. I want to check: answer= \sqrt(2)/2

Right. What I was trying to get across was to use numericValue if you need non-integer. answer = numericValue("\sqrt(2)/2") But just recognize with non-terminating decimals comparisons do not always work cleanly and you’ll want to do something similar to the other thread I referenced. Like this an…

I tried your rounding hack (4 decimal places) but when I enter the symbolic representation in the answer field it is not comparing correctly.

Oh, you’ll want to compare to the cell value rounded as well so something like: answer = numericValue("\round(\sqrt(2)/2, 4)") student = numericValue("\round(${this.cellContent(1,2)}, 4)") correct= answer = student where answer is the target answer and student is the student’s input in row 1 colum…

That makes perfect sense but I still can’t get it to work. Would you have a look at my code? The offending screen is #9. [image] Trig Review • Activity Builder by Desmos by Bruce Samuels

Looks like answer5 and answer6 were coming up undefined. I put -sqrt2/2 into the desmos calculator, then copy/pasted into CL and this works as a replacement: answer5 = numericValue("\round(-\frac{\sqrt{2}}{2}, 4)") Parentheses instead of curly braces for sqrt was probably the main culprit. Also, …

Check table value

Questions

Daniel_Grubbs April 22, 2020, 2:57am 2

Try checking out some of this thread…

Topic		Replies	Views
Verify values in a table are correct Questions	4	1849	March 8, 2021
Table correctness based on student created inputs Questions	2	2558	June 15, 2020
Check students' equations in a table - Mark correct for teacher dashboard? Questions	3	3011	May 4, 2020
Checking correctness of an inequality in two variables in table Questions	2	965	May 4, 2020
Checks in dashboard for table values Questions	7	383	February 28, 2021

Check table value

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