in most straight lines equations found in books i see that the sign of the constant is always kept positive even if it means keeping the other two coeff. negative. why?

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- Nov 13th 2013, 08:09 AMAaPaconvention in straight line equation?
in most straight lines equations found in books i see that the sign of the constant is always kept positive even if it means keeping the other two coeff. negative. why?

- Nov 13th 2013, 08:27 AMPlatoRe: convention in straight line equation?
- Nov 13th 2013, 08:43 AMHallsofIvyRe: convention in straight line equation?
- Nov 13th 2013, 09:10 AMAaPaRe: convention in straight line equation?
- Nov 13th 2013, 10:01 AMHallsofIvyRe: convention in straight line equation?
It reduces the amount of typing because you don't have to type a "leading" +! I can type 4x- 3y= 7 with only 7 symbols. But -4x+ 3y= -7 has 9 symbols to type.