From the image, the graph clearly shows a linear function. The y-intercept of the function is the point where the graph intersects the y-axis.

By looking at the graph:

• The graph intersects the y-axis at y = 4.

Thus, the y-intercept of the function is 4.

Would you like an explanation of why the y-intercept is determined this way, or help with other concepts related to graphs?

Here are 5 related questions for further exploration:

1. How do you find the slope of a linear function from a graph?
2. What is the equation of the line shown in the graph?
3. How can you identify the x-intercept from a graph?
4. What is the significance of the y-intercept in real-world problems?
5. How does the slope affect the graph's steepness and direction?

Tip: Always remember that the y-intercept occurs when $x = 0$ in any linear equation or function.