One of the line's function is known. The equation of the other function, can be found from the graph. Let's say we want to write equation in slope-intercept form. Thus, we identify the slope and the -intercept from the graph.
The slope is and the -intercept We'll now substitute these values into the slope-intercept form. To write the system of equations, we'll combine the to equations.
The solution to the system of equations is where the lines intersect. If you take a look at the graph, you see that the lines intersect in the point
The solution to the system of equations is