Final answer:
To solve the system of linear equations by graphing, plot the equations on a coordinate plane and find the point of intersection. The point of intersection represents the solution to the system.
Step-by-step explanation:
To solve the system of linear equations by graphing, we need to plot the equations on a coordinate plane and find the point of intersection, which represents the solution. Let's start with the first equation, 2x - y = 9. We can rearrange it to y = 2x - 9 and plot the line. Then, we can plot the second equation, y = 7, which is a horizontal line passing through the y-coordinate 7. The point where these two lines intersect is the solution to the system of equations.
Learn more about Solving linear equations by graphing