The problem asks to find the solution set of $y_1 = y_2$ based on the intersection of two linear functions, $y_1$ and $y_2$, as shown on the graph.

From the image, we can observe that the two lines intersect at the point where:

• $x = 10$
• $y = 19$

Thus, the solution set for $y_1 = y_2$ is the point where the two functions meet, which occurs at the coordinates $(x, y) = (10, 19)$.

Would you like further clarification on how the solution was derived?

Here are 5 related questions to consider:

1. How can you find the intersection point of two linear equations algebraically?
2. What does it mean for two functions to have an equal value at an intersection point?
3. How can you verify the solution graphically and algebraically?
4. How do slopes affect the point of intersection between two lines?
5. What happens if two lines have the same slope but different y-intercepts?

Tip: In general, the intersection of two linear functions corresponds to solving the system of equations formed by the two lines.