A student investigates how light refracts as it travels from a semi-circular plastic block into the air.
She measures the angle of incidence inside the plastic block and the corresponding angle of refraction in the air.
Her results are shown in the table below.
| Angle of incidence (∘^{\circ}∘) | Angle of refraction (∘^{\circ}∘) |
|---|---|
| 10 | 15 |
| 20 | 30 |
| 30 | 47 |
| 35 | 56 |
| 40 | 69 |
Plot these points on the grid below.
