Question

passing through the point (4,-3) and (4,-5)

Answer 1

how do i write an equation when the slope is undefined

Answer 2

if the slope is undefined, the common coordinates of the point is the equation of the line, in this case... you have it as 4...

Answer 3

4 is located at what axis, x or y? just equate it... and you're done...

Answer 4

same also when you have slope of 0... horizontal line

Answer 5

undefined slope, line is vertical...

Answer 6

okay thanks