- #1
CynicusRex
Gold Member
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Am I forgetting some critical basic knowledge?
It says: In the plane (identified by R^2) a linear equation ax+by=c is a straight line. If b=0 then this straight line is parallel with the y-axis; in the other case it is a straight line with slope -a/b. A (2 by 2)-system linear equation.
Why is it parallel? If you make b=0 in ax+by=c you still get a straight line. Or should I see it as: b y = -ax + c
It says: In the plane (identified by R^2) a linear equation ax+by=c is a straight line. If b=0 then this straight line is parallel with the y-axis; in the other case it is a straight line with slope -a/b. A (2 by 2)-system linear equation.
Why is it parallel? If you make b=0 in ax+by=c you still get a straight line. Or should I see it as: b y = -ax + c
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