Question

What is the equation of the line that passes through (1, 2) and is parallel to the line whose equation is 2x + y - 1 = 0?

2x + y + 4 = 0
2x + y - 4 = 0
2x - y - 4 = 0

Answer 1

Explanation:

since the coefficient is the same for the fist three they have the same equation.

the reason: there can only be one line that goes through one point with a specific coefficient.