The "zero" of a function refers to the value of $x$ where the graph crosses the x-axis (i.e., where $y = 0$).

Looking at the graph in your image, the line crosses the x-axis at $x = 1$. Therefore, the zero of the function is $x = 1$.

The correct answer is:

• 1

Do you need more details or have any other questions?

Here are some related questions:

1. How can we determine the slope of the line from this graph?
2. What is the equation of this line in slope-intercept form?
3. Can a linear function have more than one zero?
4. How would the graph change if the slope was negative?
5. How does the y-intercept affect the graph of a linear function?

Tip: The zero of a function is always the $x$-coordinate of the point where the function intersects the x-axis.