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

Answer 1

Explanation:

Use the point-slope formula.

y - y_1 = m(x - x_1) you have : x_1 =1 and y_1 =2

m the slope m= -2 (same slope for the line : 2x+y-1=0 because this lines are parallel and you can write y=-2x-1

an equation for this line is : y-2 = -2(x-1)