
William W. answered 11/16/22
Math and science made easy - learn from a retired engineer
Lines with an "undefined" slope are in the form of x = (some number). Examples: x = 3, x = 7, x = 100 etc.
In this case, you are given a point that the line goes through. Notice that the x-value of the point (3, 5) is 3. So x = 3 would be the equation of the line (if that's what you are looking for).