Foundation November 2024 Paper 3 Q19
19 The table shows information about the number of houses with solar panels in a town.
| Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|
| Number of houses | 50 | 65 | 115 | 210 | 275 | 350 |
(a) Complete the graph. [2 marks]
(b) Use the graph to estimate the number of houses with solar panels in 2023 [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| Plots at least 2 points correctly | M1 | \(\pm\dfrac{1}{2}\) square |
| Fully correct with all points joined by single straight lines | A1 | \(\pm\dfrac{1}{2}\) square |
Additional guidance
| Mark intention | |
| Ignore other points plotted and any lines of best fit | |
| Points may be implied by the position of the line | |
 | M1A1 |
| Answer | Mark | Comments |
|---|---|---|
| [360, 500] | B1 |
Additional guidance
| An interval given entirely in range eg 425 – 440 | B1 |
| An interval given not entirely in range eg 340 – 430 | B0 |