Finding the equation of the line when only one coordinate is given is not possible because when a point is existing in space, an infinite number of lines can be passing through it. So, finding the one particular equation will be like finding a needle in a haystack.For finding the correct or desired equation, we must have either the slope of the line or the second set of coordinates. The slope will help us get an idea about the height of the line and the other coordinate can give an estimate about the length of the line.Moreover, as the formula to calculate the equation of the line is known, \\[ y - y_{1} = m (x - x_{1})\\], it can be seen that the equation of the line can be found with any two of the factors mentioned.