Question

what have you learned so far?
write a quick summary (2-3 sentences) describing what
youve learned so far about describing vertical lines

Explanation:

Vertical lines on a coordinate plane have an undefined slope because they do not have a horizontal change (run = 0, and division by 0 is undefined). These lines are always written in the form $x = a$, where $a$ is the constant x-coordinate that every point on the line shares, meaning the line passes through the point $(a, 0)$ on the x-axis and extends infinitely up and down parallel to the y-axis. Unlike horizontal lines with a slope of 0, vertical lines cannot be expressed in slope-intercept form ($y=mx+b$) due to their undefined slope.

Answer:

Vertical lines have an undefined slope, as they have no horizontal change between any two points on the line. They are represented by the equation $x = a$, where $a$ is the fixed x-value for all points on the line, and they run parallel to the y-axis, never intersecting it except when $a=0$ (the y-axis itself).