To determine the slope for each line, we analyze the direction and angle of each line segment shown. Here’s the breakdown:

1. Line 1: The line slopes downwards from left to right, indicating a negative slope.
2. Line 2: The line is horizontal, meaning it has no rise (change in $y$) and only runs along $x$, giving it a zero slope.
3. Line 3: The line slopes upwards from left to right, showing a positive slope.
4. Line 4: The line is vertical, meaning there is no change in $x$ (only a rise in $y$), which results in an undefined slope.

Thus, the answers for each line's slope are:

• Line 1: Negative
• Line 2: Zero
• Line 3: Positive
• Line 4: Undefined

Would you like further details or have any questions?

Related Questions:

1. What is the difference between a positive and negative slope?
2. Why is a vertical line’s slope undefined?
3. How can you determine the slope of a line given two points on the line?
4. What is the meaning of a zero slope in a real-world context?
5. How do slopes relate to the angle a line makes with the x-axis?

Tip:

Remember, the slope is the ratio of the vertical change to the horizontal change. This helps in determining if it’s positive, negative, zero, or undefined.