is it 2y=-x+3?
so y= -1/2x + 3/2
is the slope -0.5?
Any line of the form y = mx + c will have gradient m. The lines | and | have the same slope because one is the same as the other, just moved to a different location.
]]>| | like these ,
Yes. And what are the slopes of those lines?
they have a θ if 90°?
No, those are called perpendicular or orthogonal lines.
]]>but not just that
if that so, can we say all lines in the world space have θ=90° are parallel?
]]>second : I want to know why any parallel lines will have same slope? I need to understand this and to take advantage from this in the future ...
]]>(find the equation for line passing through the point (1,2) and parallel to the line : x+2y=3?)
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