Asystem of equations is graphed on a coordinate plane. which coordinates are the best estimate of the solution to the system of equations? (−1, 0) (−1, −1) (1, 0) (1, −1)

The solution can be found where two lines intersect. The lines in the image do not intersect at an exact point, so we will need to estimate.
The x value is either 1 or -1 from your choices. You can see it is closer to -1 on the horizontal (x axis).
The y value is either 0 or -1 from your choices. You can see it is closer to 0 on the vertical (y axis).
The answer to your set of lines is approximately (-1,0).

Iknow one of the answers is a and maybe b but not 100% sure about b