What best describes the purpose of an arrow in a Frames-and-Arrows diagram?

What best describes the purpose of an arrow in a Frames-and-Arrows diagram?

• A. Each arrow represents a rule that determines which number goes in the next frame.
• B. Arrows show directions on a map.
• C. Arrows decorate the diagram.
• D. Arrows indicate time order only.

Answer: (A)

Frames-and-Arrows diagrams use arrows to show how to move from one frame to the next by applying a rule. An arrow represents the rule that tells you what number goes in the next frame when you start from the current frame. It isn’t about directions on a map, nor is it just decorative, and it isn’t limited to indicating time order. The arrow encodes the operation or relationship that determines the next number, so following the arrow means applying that rule to get the next frame’s value.

Frames-and-Arrows diagrams use arrows to show how to move from one frame to the next by applying a rule. An arrow represents the rule that tells you what number goes in the next frame when you start from the current frame. It isn’t about directions on a map, nor is it just decorative, and it isn’t limited to indicating time order. The arrow encodes the operation or relationship that determines the next number, so following the arrow means applying that rule to get the next frame’s value.