Write the equation of the line satisfying the given conditions.

Passing through ( 5, 4 ) whose slope is undefined

A vertical line:

X = 5 for all real values of Y.

To find the equation of a line passing through a given point with an undefined slope, we need to use the equation of a vertical line.

A vertical line has an undefined slope because its slope is not defined by a specific value. Instead, it is represented by the equation x = c, where c is a constant representing the x-coordinate of any point on the line.

In this case, the line passes through the point (5,4). Therefore, the equation of the line will be x = 5, representing a vertical line passing through the x-coordinate 5.

So, the equation of the line satisfying the given conditions is: x = 5.