Respuesta :
A line whose slope is undefined has no finite slope; the line is a vertical one.
A vertical line has an equation of the form x = k. In this case, since the line passes thru (-6,4), the eq'n of the line is x = -6.
A vertical line has an equation of the form x = k. In this case, since the line passes thru (-6,4), the eq'n of the line is x = -6.