Y = kx + b A ( 2 ; 1 ) ; B ( - 3 ; 5 ) 1 = 2k + b 5 = - 3k + b - 5 = 3k - b - 4 = 5k k = - 0,8 1 = 2*( - 0,8 ) + b 1 + 1,6 = b b = 2,6 ответ y = - 0,8x + 2,6 ( AB )
C ( 1 ; 3 ) ; D ( - 2 ; - 1 ) 3 = k + b - 1 = - 2k + b 1 = 2k - b 4 = 3k k = 4/3 = 1 1/3 3 = 1 1/3 + b b = 2 3/3 - 1 1/3 = 1 2/3 ответ y = 1 1/3x + 1 2/3 ( CD )
A ( 2 ; 1 ) ; B ( - 3 ; 5 )
1 = 2k + b
5 = - 3k + b
- 5 = 3k - b
- 4 = 5k
k = - 0,8
1 = 2*( - 0,8 ) + b
1 + 1,6 = b
b = 2,6
ответ y = - 0,8x + 2,6 ( AB )
C ( 1 ; 3 ) ; D ( - 2 ; - 1 )
3 = k + b
- 1 = - 2k + b
1 = 2k - b
4 = 3k
k = 4/3 = 1 1/3
3 = 1 1/3 + b
b = 2 3/3 - 1 1/3 = 1 2/3
ответ y = 1 1/3x + 1 2/3 ( CD )