Question

The slope of a line is undefined, and the x-intercept is -7. What is the equation of the line?

Answer 1

The slope of a line is undefined, and the x-intercept is -7. What is the equation of the line?

Answer:

x = -7

Answer 2

"Undefined slope" means the line is vertical on the graph.
Every point on the line has the same x-coordinate.
If the line crosses the x-axis where x=-7, then the
x-coordinate of every point on the line is -7, and the
equation of the line is
x = -7 .