The blue line is the graph of y = –x + 3. Use the sliders to make the orange line represent y = –2x + 9. Examine the graph. What appears to be the solution of this system of equations?

The solution is where the two lines have the same x- and y-values. Set their equations equal: −x + 3 = −2x + 9, which gives x = 6; substituting into y = −x + 3 gives y = −3. The lines intersect at (6, −3), choice C.

AI-written and checked against the verified answer.