Foundation June 2018 Paper 1 Q9
9 You can use this graph to change between temperatures in degrees Celsius (°C) and temperatures in degrees Fahrenheit (°F).
The temperature in Dubai on Monday increased by 20 °C from midnight to midday.
(a) What is this temperature increase in degrees Fahrenheit? (2)
Maninder says,
“30 °C is the same as 86 °F, therefore 60 °C will be the same as 172 °F.”
(b) Is Maninder correct?
Give a reason for your answer. (1)
Give a reason for your answer. (1)
| Scheme | Marks |
|---|---|
| Two readings from graph 20 °C apart eg. readings from 0 °C (30 – 34 °F) and 20 °C (66 – 70 °F) | M1 |
| 36 | A1 |
| (2) |
Notes
A1: accept answer in range 34 – 38
| Scheme | Marks |
|---|---|
| No with explanation | B1 |
| (1) | |
| (3 marks) |
Notes
B1: e.g. graph does not go through (0,0) (accept 0) or temperatures in °F are not proportional to temperatures in °C or gives counter example that doubling does not work or 60 °C is the same as 140 °F (135 – 145) or 15 °C is not 43 °F