Question 173513
The equation of the line parallel to the line whose equation is 2x+y=0 and passing through the point P(1,-3) is ________ 
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Parallel lines have the same slope.
Find the slope of the line by putting it into slope-intercept form.
2x+y=0
y = -2x
The slope, m, = -2
Then,
y-y1 = m*(x-x1) where (x1,y1) is the point (1,-3)
y+3 = -2(x-1)
y+3 = -2x+2
y = -2x - 1  slope-intercept form
2x+y = -1  standard form