The aim of the graphic answer type is to allow questions with an answer requiring the student to draw something on a canvas instead of selecting an option or writing an algebraic expression. With this feature, students will be able to draw points, lines, circles, conic sections, and more, and the new evaluation criteria will do the rest!

When the Graphic option is selected, the equation editor gets replaced by the drawing tool. You may readily draw the correct answer to the question using the upper toolbar.

Bear in mind students will use the same toolbar (or a reduced version) to answer the question. They will be also able to use the handwriting to do so, you can see more details here.

### Initial content

It's also possible to include initial content for the students. It can be very useful when, for instance, we want them to indicate some elements of a given object.

Sometimes we may be interested in not providing the student with all the graph resources. In the Customize toolbar section, you can define which of them will be shown in the student's graph by simply checking or unchecking the corresponding box. They are all selected by default.

The graph resources are divided into five sections explained below: toolbar, menu, floating, contextual (elements), and contextual (labels).

### Toolbar

The Toolbar is at the core of many of the graph's possibilities. You can hide some icons to facilitate the research of those which the students need or to make the problem's resolution a little bit more complicated.

Element Description Icon
Select To select objects and see its algebraic expression and modify its properties
Handwriting To handwrite any of the existing objects. See how here
Point To draw a single point
Lines Line: To draw a line passing through two given points
Segment: To draw a segment between two given points
Ray: To draw a ray given a starting point and a direction
Vector: To draw a vector given a starting point and a direction
Parallelogram: To draw a parallelogram given a starting point and two different directions
Polyline: To draw a polyline given an ordered set of points
Polygon: To draw a polygon given a closed ordered set of points
Conic sections Circle by center and point: To draw a circle given its center and a belonging point
Circle by three points: To draw a circle passing through three given points
Arc: To draw an arc of circumference
Parabola: To draw a parabola given a directrix line and its center
Ellipse: To draw an ellipse given an axis and a belonging point
Hyperbola: To draw an hyperbola given
Conic: To draw a general conic section given five belonging points
Measures Area: To fill an enclosed region and calculate its area
Angle: To calculate the counterclockwise angle between two given elements
Length: To calculate the length of a bounded unidimensional element
Label To include any label within the plotter
Expression To include the graphic representation of any mathematical expression
Undo To undo the last performed action
Redo To redo the last erased action

The Menu options allow the students to configure the main plotter settings.

Element Description Icon
Delete all To delete everything drawn in the graph (included the initial content)
Settings To modify the plotter configuration. See all the available options here

### Floating

The Floating elements are thought to facilitate the students' view of the plotter and to make the content creation more comfortable.

Element Description Icon
Zoom in To zoom in the plotter
Zoom out To zoom out the plotter
Anima To make the elements apparition dynamic. The different objects of the answer will appear one by one in its creation order.
Maximize To maximize (or minimize) the plotter

### Contextual (elements)

The Contextual (elements) options enable the capability of modifying a plotted object appearance.

Element Description Icon
Fix label To fix the algebraic expression of the represented object
Line width To modify the line width of the represented object
Line style To modify the line style of the represented object
Line color To modify the line color of the represented object
Delete To delete the represented object

### Contextual (labels)

The Contextual (labels) enables the capability of representing a function by giving its algebraic expression or to include any text in the plotter. The labels in grey are only available if we are introducing a mathematical expression.

Element Description Icon
Bold To write text in bold
Italic To write text in italics
Color To write text in any of the available colors
Big fraction To add a fraction
Square root To add a square root
Root To add a generic root
Number To add the irrational numbers or Functions To add any of the available functions ( , , , …)
Delete To delete the written text or formulas

The validation options field allows to define us how we want to evaluate the student's answer. This section is divided into two sections explained below.

### Elements

The Elements subsection is thought to select the elements in the answer to be evaluated. By default, all the elements will be taken into account and they will have to match the student answer to be graded correctly.

On the other hand, it's also possible to distribute the grade among those selected elements in case we want to consider partial grading.

### Criteria

The Criteria subsection is thought to set the amount of error allowed between the student answer and the correct answer. Moreover, it's also possible to consider some additional properties explained below.

• Prohibit superfluous elements in the student answer: There can't be more elements in the student answer than in the correct answer.
• Match color: The elements in the student answer must have the same color as in the correct answer.
• Match line type: The elements in the student answer must have the same line type as in the correct answer.

Imagine we want to create a question asking to draw, given the line , its perpendicular line through the point . To do so, we have to start defining the initial content. You can use the line icon or introduce its algebraic expression.

Once we have defined the initial content, we have to move on to the Correct answer field and define the perpendicular line.

Then, we need to define which elements do we want the students to use to provide an answer. As they have to draw a line, we may be only interested in keeping the line icons and the expression option.

Finally, we have to define the validation properties which we want to take into account to grade the students answer correctly. We will only validate the answer if it matches the perpendicular line.

We can preview the question by clicking the Test the question. Thus, we can verify if it's working as we expected.