Question

vertical lines
a vertical line is written in the form
x = a, where a represents the line’s
x-intercept.
graph of a coordinate plane with two vertical lines
in this case, ________.

Explanation:

To determine the equation of the vertical lines, we analyze the graph:

Step 1: Identify the x - intercepts

Looking at the grid, we assume the vertical lines are at \( x=-1 \) (left vertical line) and \( x = 0 \) (right vertical line, the y - axis, but usually, we focus on the non - y - axis vertical line here). Wait, let's re - examine. If we consider the standard grid, let's count the units. Let's assume the right vertical line is at \( x = 0 \) (y - axis) and the left one is at \( x=-1 \)? Wait, no, maybe the left vertical line is at \( x=-1 \) and the right at \( x = 0 \)? Wait, actually, let's check the x - intercept. For a vertical line \( x=a \), \( a \) is the x - intercept.

Looking at the graph, the left vertical line (not the y - axis) has an x - intercept. Let's count the grid squares. If the right vertical line is the y - axis (\( x = 0 \)), and the left vertical line is 1 unit to the left of the y - axis, so its x - intercept is \( x=-1 \)? Wait, no, maybe the left vertical line is at \( x=-1 \) and the right at \( x = 0 \). But the problem says "In this case", so we need to find the equation of the vertical line (probably the left one). Wait, maybe the left vertical line has x - intercept \( a=-1 \), so the equation is \( x=-1 \)? Wait, no, let's think again. If the vertical line is at \( x=-1 \), then the equation is \( x=-1 \). But maybe the intended line is the left one. Wait, let's check the grid. Let's assume that the vertical line (the non - y - axis one) is at \( x=-1 \), so the equation is \( x=-1 \). But maybe I made a mistake. Wait, the y - axis is \( x = 0 \), and the other vertical line is at \( x=-1 \) (1 unit left of y - axis). So the equation of that vertical line is \( x=-1 \).

Wait, maybe the problem is to find the equation of the vertical line (the left one). So:

Step 1: Determine the x - intercept

The vertical line intersects the x - axis at \( x=-1 \) (assuming the grid has the y - axis at \( x = 0 \) and the left line is 1 unit left).

Step 2: Write the equation

Since a vertical line has the form \( x=a \), where \( a \) is the x - intercept. So if \( a=-1 \), the equation is \( x=-1 \). But maybe the intended answer is \( x=-1 \) (or if it's the y - axis, \( x = 0 \), but the y - axis is a special case). Wait, maybe the left vertical line is at \( x=-1 \), so the equation is \( x=-1 \).

Answer:

If we consider the left vertical line, the equation is \( \boldsymbol{x=-1} \) (or if it's the y - axis, \( x = 0 \), but likely \( x=-1 \) for the non - y - axis vertical line).