斜率为k = (3-0)/(0-5)=-3/5;两点式(y-0)(0-5) = (x-5)(3-0);
点斜式y-0=-3/5(x-5);
截距式y/3+x/5 = 1;
一般方程3x+5y-15=0;
点C到直线距离为|3+2×5-15|/√(3^2+5^2) = √34/17
斜率为k = (3-0)/(0-5)=-3/5;两点式(y-0)(0-5) = (x-5)(3-0);
点斜式y-0=-3/5(x-5);
截距式y/3+x/5 = 1;
一般方程3x+5y-15=0;
点C到直线距离为|3+2×5-15|/√(3^2+5^2) = √34/17