## Using The Repeated Shapes Option In Graphing

Avoid overlaid duplicate shapes by using the "Ignore Repeated Shapes" flag.

In the graph plotting question, it is easy for authors or students to plot duplicate shapes on top of each other without realizing it. It is impossible to tell if there are duplicate shapes from a purely visual inspection.

Duplicate shapes can cause validation to fail if the Ignore repeated Shapes option is not switched on.

To avoid this issue, authors can use the* Ignore Repeated Shapes* flag. This can be found in Validation.

The possible options are:

**Value: **No

**Result:**

Repeated shapes are not ignored.

**Value: **Compare by slope

**Result:**

Repeated shapes are ignored even if the points are not equal, e.g. the two lines here would be considered equivalent because the slopes of the line are equal.

These two lines would not be considered equivalent:

**Value: **Compare by points

**Result:**

Repeated shapes are ignored only if the points are equal. e.g. the two lines here would be considered equivalent because the points are equal:

These two lines would not be considered equivalent: