The graph which shows a system of equations with a solutions at (2, -1) is the last graph.
What is graph?
In mathematics, the graph of a function f is the set of ordered pairs.
In the common case where x and f(x) are real numbers, these pairs are Cartesian coordinates of points in two-dimensional space and thus form a subset of this plane.
We have to find the graphs that shows a system of equations with a solution at (2,-1)
The solution to a system of equations is the point on a graph where the two lines intersect.
The graph where the point of intersection is (2, -1) is the last graph.
Hence we can conclude that Last Graph is correct answer.
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