ANSWER
The correct answer is

Step-by-step explanation
The graph of two straight lines are drawn on the same graph sheet.
The point of intersection of these two straight lines is the solution to the system of equations the two lines represent.
Reading from the graph, the two straight lines meet at their y-intercept.
The coordinate of their point of intersection is

Meaning that,

and

Therefore the solution to the system of equations is

The correct answer is C.