Algebra-1

To determine which equation represents a line with an undefined slope, we need to recall the characteristics of slopes for different types of lines.

The slope of a line is defined as the change in  divided by the change in  (). A line has an undefined slope when the change in  () between any two points on the line is . This occurs when the line is vertical.

Let's analyze each of the given equations:

A.Equation

The equation  represents a vertical line. For every point on this line, the -coordinate is always , and the -coordinate can take any value. Since the change in  between any two points on this line is , the slope  is undefined.

B.Equation

This equation is in the slope-intercept form

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