Question 127136
Write the equation of the line with x-intercept (–, 0) and undefined slope.


First thing, a line with an undefined slope is a vertical line.  That means that every point on the line has the same x-coordinate, and the y-coordinates are all of the real numbers.  I'm not sure what you meant by the - for the x-coordinate in the given ordered pair, but let's just say it stands for some real number a.  Then the x-intercept would be (a,0).  Since every point on the line must have an x-coordinate of a and we don't care what y is, the equation is simply {{{x=a}}}  (and you can replace the a with whatever number you meant to put into your given ordered pair)