Reading Graphical Representations

This detailed page explains the fundamental concepts of reading and interpreting graphical representations on a coordinate system. The content focuses on two main operations: finding images of numbers and identifying antecedents.

Definition: An image is the corresponding y-value for a given x-value on a graph, while an antecedent is the x-value that corresponds to a given y-value.

Example: To find the image of 2, locate the number 2 on the x-axis (abscissa), then move vertically to find its corresponding point on the graph.

Highlight: The coordinate system shown ranges from -7 to 9 on the x-axis and -5 to 6 on the y-axis, providing a comprehensive range for plotting points.

Vocabulary:

• Abscisses: The x-axis or horizontal axis
• Ordonnée: The y-axis or vertical axis
• Image: The corresponding y-value for a given x-coordinate
• Antécédent: The corresponding x-value for a given y-coordinate

Quote: "On repère le nombre 2 sur l'axe des abscisses, on voit l'image" (One locates the number 2 on the x-axis to see its image)