Foundation November 2019 Paper 3 Q15
15 The table shows the cost of hiring a concrete mixer for up to 5 days.
| Number of days | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Cost | £14 | £24 | £34 | £44 | £54 |
Eva hires the concrete mixer for 5 days.
She says,
“The rate is £14 per day because the cost for 1 day is £14”
Is she correct?
Give a reason for your answer. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| No and fully correct reason | B2 | eg No and it is (£)10 (per day after the first day) or No and it is (£)10.8(0) per day for five days or No and it would be (£)70 for five days or No and you pay more for the first day B1 No and partially correct reason eg No and (£)10.8(0) or fully correct reason with no decision or incorrect decision eg it is (£)10 (per day after the first day) |
Additional guidance
| Equivalent values for (£)10.8(0) per day for five days (£)11.(00) per day for four days (£)11.33 per day for three days (£)12.(00) per day for two days | |
| Equivalent values for (£)70 for five days (£)56 for four days (£)42 for three days (£)28 for two days | |
| Do not ignore incorrect reasons with a correct reason for B2 | |
| Calculations must be correct for B2 | |
| Ignore irrelevant reasons with a correct reason | |
| No, \(24 - 14 = 10\) | B2 |
| No, as next would be 28 | B2 |
| No and \((C =)\ 10n + 4\) | B2 |
| Correct reason stated with decision yes | B1 |
| No, it is £28 (partially correct reason) | B1 |
| No, it is £12 | B1 |
| No, \(5 \times 14\) is not 54 | B1 |
| States No with no reason | B0 |
| States No with incorrect reason | B0 |
| No, it does not go up by (£)14 per day | B0 |