The Zoom Number Line interaction allows authors to set an answer that is more granular than can be supported in the Number Line Interaction. Students add a response by first clicking the regular number line and then adding their response in the blue zoomed in area. This is a machine scored interaction.

See Author Test Items and Choice Interaction for general instruction on item creation.

Create a Zoom Number Line Interaction

1. From the Editor tab, select Add Interaction > Charts & Graphs > Zoom Number Line.
2. Enter a prompt. 
3. For Min, enter the starting number.
4. For Primary Intervals, enter the last number.
5. For Primary Interval Distance, indicate the largest unit by which the Primary Interval should be split out.
6. For Secondary Intervals, indicate how many intervals to add between the primary labeled numbers.
7. Now you will set up what appears in the zoomed in portion when students click an interval on the main number line. For Zoomed Intervals, indicate how many to include
8. For Decimal Places, specify the maximum number. (For example, if a point of the line works out to 3.75, entering '1' here will make this display as 3.8.)
9. Selecting Show zoom labels displays all points, not just the start and end values.
10. In Scoring Settings, Max Points defaults to one but may be changed.
11. Under Correct Response, click the correct area on the main number line and then plot the correct answer in the zoom area.
12. Be sure to save.

Tiny Link: https://support.assessment.pearson.com/x/wwBaCw