(A) (4, 6)
Step-by-step explanation:
Since the 2nd stage light is above P, then its x-coordinate is also the same as that of P, which is 4. We know that there are 2 units per grid and since the 2nd stage is 8 units above P, the conversion to the number of grids is
[tex]8\:\text{units}×\dfrac{1\:\text{grid}}{2\:\text{units}} = 4\:\text{grids}[/tex]
So count 4 grids above the location of P, which is (4, -2) and you will get the coordinate (4, 6).
