What is the slope of the line x-4?

Answer 1

You can always find out the slope of a line by looking at the number before the variable. As you can see, there is no number in front of x, so how is there a slope? If X is ever alone, that means that there is one X, so the slope of the line is 1.

Answer 2

Not enough information has been given but if you mean x = 4 then there is no slope of the line.