GCSE Secondary Maths Age 13-17 - Probability & Statistics: Interpreting Graphs - Explained

The video tutorial discusses a graph drawn by Sam to show TV sales by Sam and Max from Monday to Friday. It identifies three main issues with the graph: the absence of a key, missing labels on the Y-axis, and a missing number on the Y-axis. The tutorial emphasizes the importance of having a key and proper labels on both axes for clarity. Each identified mistake is worth one mark, and the tutorial concludes with a reminder of these essential graph components.

What is the main purpose of the graph drawn by Sam?

• To illustrate the working hours of Sam and Max.

• To display the total revenue generated by the shop.

• To show the number of TVs sold by Sam and Max each day.

• To compare the prices of different TV models.

Why is the absence of a key considered an error in the graph?

• It causes the graph to have too many colors.

• It makes the graph look unprofessional.

• It prevents understanding what each column represents.

• It makes the graph too complex to read.

What is the consequence of not having a label on the Y-axis?

• It makes the graph appear larger.

• It causes the graph to be misaligned.

• It leads to confusion about the scale of the data.

• It results in the graph having too many labels.

What number is missing on the Y-axis of the graph?

• Three

• Four

• Six

• Five

How many marks are awarded for identifying all the errors in the graph?

• Four marks

• Three marks

• Two marks

• One mark