pxt-calliope/docs/lessons/charting/quiz-answers.md

# charting quiz answers

Measure the acceleration on the @boardname@ in the "x" direction. 


## Name

## Directions

Use this activity document to guide your work in the [charting activity](/lessons/charting)

Answer the questions while completing the tutorial. Pay attention to the dialogues!

## 1. Why are you creating a 'forever' loop?

<br/>

We are creating a forever loop to constantly display the appropriate brightness on the LED display.

## 2. Write the line of code to measure the acceleration with respect to the "x" axis and display this value in a bar graph.

<br/>

```blocks
led.plotBarGraph(input.acceleration(Dimension.X), 0)
```

## 3. After vigarously moving the @boardname@ from side to side along the "x" axis for a sufficient amount of time,insert the Excel graph for displaying a line chart used to display trends over time. 

<br/>

![](/static/mb/line_chart.png)