# Checking student answer as a coordinate point
**URL:** https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537
**Category:** Questions
**Created:** [November 4, 2022, 9:25pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537 "2022-11-04T21:25:56Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 4, 2022, 9:25pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/1 "2022-11-04T21:25:56Z")
Hello, I am new to computation layer.
I understand how to get it to check a student numerical input, but how can I get it to check a student numerical point?
I am trying to use it for the solution to a system of equation.
---
### Author:  [@tarnold](https://cl.desmos.com/u/tarnold)
#### Post date: [November 5, 2022, 12:34pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/2 "2022-11-05T12:34:01Z")
Could you provide a link to your activity or copy the code?
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 7, 2022, 5:36pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/3 "2022-11-07T17:36:37Z")
correct: this.numericValue= (-4,1)
correct: correct
I have a feeling it’s because of the coordinate not being a “numeric” value, so what option should I use?
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 7, 2022, 6:47pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/4 "2022-11-07T18:47:12Z")
I figured it out. I ended up using a table to check their coordinate point.
However, when I change the table format to “math input,” it does not show students whether they are correct or not. (I left it as a text)
Here is the code on the table:
correct: table1.cellContent(1,1)=“(-4,1)”
cellContent(1,2):when table1.cellContent(1,1)=“(-4,1)”
“✅”
otherwise " "
---
### Author:  [@pirsquared](https://cl.desmos.com/u/pirsquared)
#### Post date: [November 8, 2022, 7:43pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/5 "2022-11-08T19:43:50Z")
For coordinate pairs, you need to use `parseOrderedPair` - for example, something like
`correct: parseOrderedPair(this.latex).x=-4 and parseOrderedPair(this.latex).y=1`
should do the trick. You could also have something like `coord=parseOrderedPair(this.latex)` and then just use `coord.x=-4 and coord.y=1`
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 8, 2022, 10:24pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/6 "2022-11-08T22:24:18Z")
@pirsquared @tarnold
Can you check this code for inp4?
I am also expecting a coordinate as their answer, and on the teacher dashboard it is marking it correct, but the feedback is not giving them as a correct answer.
> **[\[Copy of\] Systems of Equations (Substitution Method) • Activity Builder by...](https://teacher.desmos.com/activitybuilder/custom/636ad6a12ba5606adfa04209)**
>
> by Isabel Ramirez
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 8, 2022, 10:27pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/7 "2022-11-08T22:27:58Z")
@pirsquared @tarnold actually, any point they enter is being marked correctly.
---
### Author:  [@pirsquared](https://cl.desmos.com/u/pirsquared)
#### Post date: [November 8, 2022, 11:03pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/8 "2022-11-08T23:03:03Z")
```auto
coord=parseOrderedPair(this.latex)
correct: numericValue(coord.x)=3 and numericValue(coord.y)=8
```
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 9, 2022, 4:34pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/9 "2022-11-09T16:34:34Z")
I keep getting an error message saying "Component “undefined: had no source “latex”. It actually doesn’t have any sources at all. Sorry about that.”
---
### Author:  [@pirsquared](https://cl.desmos.com/u/pirsquared)
#### Post date: [November 9, 2022, 7:41pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/10 "2022-11-09T19:41:51Z")
Where are you getting this error message? Can you share your updated activity?
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 9, 2022, 8:37pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/11 "2022-11-09T20:37:41Z")
> **[\[Copy of\] Systems of Equations (Substitution Method) • Activity Builder by...](https://teacher.desmos.com/activitybuilder/custom/636ad6a12ba5606adfa04209)**
>
> by Isabel Ramirez
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 9, 2022, 8:38pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/12 "2022-11-09T20:38:13Z")
> **[\[Copy of\] Systems of Equations (Substitution Method) • Activity Builder by...](https://teacher.desmos.com/activitybuilder/custom/636ad6a12ba5606adfa04209)**
>
> by Isabel Ramirez
I have it in the last “note box” but can you check inp4? Maybe I’m missing something
---
### Author:  [@pirsquared](https://cl.desmos.com/u/pirsquared)
#### Post date: [November 9, 2022, 10:02pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/13 "2022-11-09T22:02:13Z")
Put this in your note box:
```auto
coord=parseOrderedPair(inp4.latex)
correct = numericValue(coord.x)=3 and numericValue(coord.y)=8
content:"${feedback}"
feedback= when inp4.submitted and correct "✅ Good work!" when inp4.submitted "🤔 Keep thinking" otherwise " "
```
You can also have
```auto
coord=parseOrderedPair(inp4.latex)
correct: numericValue(coord.x)=3 and numericValue(coord.y)=8
```
in inp4, if you want the dashboard checks to work as well.
---
### Author:  [@Isabel\_Ramirez](https://cl.desmos.com/u/Isabel_Ramirez)
#### Post date: [November 9, 2022, 10:25pm UTC](https://cl.desmos.com/t/checking-student-answer-as-a-coordinate-point/4537/14 "2022-11-09T22:25:26Z")
THANK YOU SO MUCH!
It’s working 🙂