Given line L and line y = 2x + 1, the expression of line L is determined according to the following conditions (2) Line L passes through point a (- 1, - 5) It is known that the line L is parallel to the line y = 2x + 1

Given line L and line y = 2x + 1, the expression of line L is determined according to the following conditions (2) Line L passes through point a (- 1, - 5) It is known that the line L is parallel to the line y = 2x + 1

If the line L is parallel to the line y = 2x + 1, then let the equation of the line l be y = 2x + B, which can be obtained by substituting a (- 1, - 5), B = - 3, that is, the equation of the line L is y = 2x-3
If the line L is perpendicular to the line y = 2x + 1, then let the linear l equation be y = - 2x + B, which can be obtained by substituting a (- 1, - 5), B = - 7, that is, the linear l equation is y = - 2x-7