Higher November 2018 Paper 1 Q6
6 A ship is sailing in a straight line from its home port.
The distance-time graph shows 4 hours of the journey.
Work out the speed of the ship during these 4 hours. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| Correct reading of at least one value at 0 hours [46, 50] at 1 hour [63, 67] at 2 hours [80, 84] at 3 hours [96, 100] at 4 hours [114, 118] | M1 | may be seen on graph |
| \(\dfrac{\text{subtraction of two values}}{\text{correct number of hours}}\) | M1 | division by 1 may be implied |
| 17 | A1 | SC1 29 |
| Alternative method 2 | ||
| A difference in the range for 1 hour [15, 19] for 2 hours [32, 36] for 3 hours [49, 53] for 4 hours [66, 70] | M1 | may be seen on graph |
| \(\dfrac{\text{difference}}{\text{correct number of hours}}\) | M1 | division by 1 may be implied |
| 17 | A1 | SC1 29 |
Additional guidance
| \((119 - 42) \div 4 = 19.25\) | M0M1A0 |
| for 2nd M1 in Alt 1, subtraction must be in the correct order unless recovered | |
| 17 does not imply three marks, so working must be checked eg \((110 - 42) \div 4 = 17\) | M0M1A0 |