To identify the mistakes Albert made on the distance-time graph based on his cycling journey, let’s break it down:

Albert’s Journey:

1. Cycled 3 km in 8 minutes.
2. Stopped at a friend's house for 10 minutes.
3. Cycled the remaining 2 km to school in 12 minutes.

Analyzing the Graph:

From this description and the list of possible mistakes, here is how to check the graph:

1. Missing units from the time axis:
   The graph needs time labels with proper units (e.g., minutes or hours). If they are missing, this is a mistake.

2. Missing units from the distance axis:
   Similarly, the distance axis should clearly state units (e.g., km).

3. The horizontal section should be shorter:

   • Albert stopped for 10 minutes, so the graph’s horizontal line (indicating no movement) should span exactly 10 minutes.
   • If it is longer than 10 minutes, this is incorrect.

4. The horizontal section should be longer:

   • If the horizontal line is too short (less than 10 minutes), this would also be an error.

5. The line should not start at 11:00:

   • Albert left home at 11:00. If the graph starts before this time, it is a mistake.

Next Steps:

Look closely at the graph and check:

• Are the units on both axes present?
• Does the horizontal section correctly represent 10 minutes?
• Does the graph start at 11:00?

Would you like me to analyze this further step-by-step with explanations?

Related Questions:

1. How do you draw an accurate distance-time graph for this journey?
2. How do you calculate speed from a distance-time graph?
3. What does a horizontal line mean on a distance-time graph?
4. How can we correct Albert’s mistakes in this graph?
5. Why is it important to include units on graph axes?

Tip: A slope on a distance-time graph represents the speed—steeper slopes indicate faster movement.