Question

Persamaan garis melalui titik (3,-2) Dan (-1,1) adalah...
A. 3x+4y=-1
B. 3x+4y=13
C. 3x-4y=17
D. x-4y=-17

pakaicarayaa ​

Answer 1

kecerunan = (y2 - y1) / (x2 - x1)

= (1 + 2) / (-1 - 3)

= - 3/4

formula , y = mx+ c , (-1,1)

1 = -3/4(-1) + c

1 = 3/4 + c

4 = 3 + 4c

c = 1/4

persamaan garis lurus,

y = - 3/4x + 1/4

4y = -3x + 1

3x + 4y = 1