Maya tracks her mobile phone's battery percentage while watching a live stream for 80 minutes.
| Time (minutes) | Battery (%) |
|---|---|
| 0 | 100 |
| 20 | 90 |
| 40 | 80 |
| 60 | 70 |
| 80 | 60 |
A line graph shows the relationship between time (minutes) on the xxx-axis and battery percentage (%) on the yyy-axis. The xxx-axis ranges from 0 to 200 with grid lines every 20 units. The yyy-axis ranges from 0 to 100 with grid lines every 10 units. A straight line starts at (0,100)(0, 100)(0,100) and ends at (80,60)(80, 60)(80,60).
What was the battery percentage of Maya's phone when she started watching the live stream?
How many more minutes can Maya watch the live stream before her phone battery reaches 0%?
What assumption have you made to calculate your answer to (b)?
Practise Oxford AQA IGCSE Maths Real Life and Distance Time Graphs with exam-style questions for Core and Extended tier. 21 questions, matched to the Oxford AQA IGCSE Maths (9260) specification and written in Paper 1 and Paper 2 (Core: 1C and 2C; Extension: 1E and 2E) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.