SAT Question e6545fa8: Systems of Linear Equations answer and explanation with Desmos solution

Choice B is correct. If a point $\left(x,y\right)$ lies on both lines in the graph of a system of two linear equations, the ordered pair $\left(x,y\right)$ is a solution to the system. The graph shown is the graph of a system of two linear equations, where the two lines in the graph intersect at the point $\left(3,4\right)$. Therefore, the point $\left(3,4\right)$ lies on both lines, so the ordered pair $\left(3,4\right)$ is the solution to the system.