Tracy's Command and Coordinate Concepts

This video tutorial introduces Tracy's grid world, explaining its coordinate system and dimensions. It covers basic commands like forward, backward, pen up, and pen down, which control Tracy's movement and trail. Advanced commands such as set position, go to, set X, and set Y are also discussed, allowing precise control over Tracy's location on the grid.

What is the starting coordinate for Tracy in her grid world?

• (0, 0)

• (-200, 200)

• (200, -200)

• (100, 100)

How wide is the canvas in Tracy's grid world?

• 200 pixels

• 800 pixels

• 400 pixels

• 600 pixels

What happens when you use the backward command with Tracy?

• She moves forward

• She moves in reverse

• She rotates

• She stops

Which command prevents Tracy from leaving a trail?

• Set position

• Pen down

• Go to

• Pen up

What is Tracy's default behavior when moving?

• Stops

• Rotates

• Does not leave a trail

• Leaves a trail

Which command allows Tracy to move directly to a specific coordinate?

• Set position

• Forward

• Backward

• Pen up

Does Tracy change direction when using the set position command?

• Depends on the coordinate

• Yes, always

• Only sometimes

• No, never

What does the set X command do?

• Changes only the y-coordinate

• Changes both coordinates

• Changes only the x-coordinate

• Does not change any coordinate

If Tracy's y-coordinate is set to 100, what happens to her x-coordinate?

• It changes to 100

• It remains the same

• It changes to 0

• It changes to -100

Which command would you use to change only Tracy's y-coordinate?

• Pen down

• Go to

• Set Y

• Set X