Just a really quick one, suppose I have a line of equation: y=1/2x+5/2
The next part of the question asks for this in the form of ax+by+c=0
How do I convert from y=mx+c to ax+by+c=0?
Thank youuu!
did you read what i said? i said bring everything over to one side, how does that translate to equating y to zero?
$\displaystyle y = \frac 12x + \frac 52$ ............subtract y from both sides
$\displaystyle \Rightarrow 0 = \frac 12x - y + \frac 52$ ...............multiply through by 2
$\displaystyle \Rightarrow 0 = x - 2y + 5$
which is the same thing as
$\displaystyle x - 2y + 5 = 0$
here a = 1, b = -2 and c = 5