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y-y1(x-x1) y=5kx+3 y=9k(x-x1) y=4x+b
3x+4y-14=0 3x-4y+14=0 4x+3y-14=0 4x-3y+14=0
(1,-2)且斜率为3的直线方程是( )
A.3x+y-5=0 3x-y-5=0 3x-y+1=0 3x+y-1=0
3x+4y+7=0 4x+3y+7=0 4x+3y-42=0 3x+4y-42=0
(1,-2)且斜率为3的直线方程是( ) A. 3x-y+1=0 3x+y-5=0 3x-y-5=0 3x+y-1=0
3y-y1=x-x1 y=3kx+b-2 y-y1=k(x-x1) y=ax -4
3x+4y+2=0 3x-4y-2=0 4x+3y+2=0 4x-3y-2=0
y-y1=k(x-x 1) y=5k x+3 y=9k(x-x 1) y=4x+ b
y-y1=k(x-x1) y=5kx+3 y=9k(x-x1) y=4x+b
3x+4y﹣14=0 3x﹣4y+14=0 4x+3y﹣14=0 4x﹣3y+14=0
y=3kx y=2kx+b y-y 1=k(x-x 1) y=ax+b
y-y 1=k(x-x 1) y=5kx+3 y =9k(x-x 1) y=4x+b
2x﹣y﹣3=0 2x﹣y+3=0 2x+y+3=0 2x+y﹣3=0
3x+4y﹣14=0 3x﹣4y+14=0 4x+3y﹣14=0 4x﹣3y+14=0
x+4y-2=0 x-4y+2=0 4x+2y-1=0 4x-2y-1=0
y-y1=k(x-x 1) y=kx+8 y=4kx y=ax+b
3x+4y-14=0 3x-4y+14=0 4x+3y-14=0 4x-3y+14=0