tolong jawab dg cepat ya

1,a. 3 1/2 krn sejajar, jadi tidak berubah
b. tegak lurus: m1×m2=-1
7/2 × m2 = -1
m2 = -1 : 7/2
m2= -1/1 : 7/2
m2 = -1/1 × 2/7
m2 = -2/7

2,a. gradiennya = -4 krn sejajar
b. tegak lurus
-4 × m2 = -1
m2 = -1 : -4
m2 = 4
gradiennya = 4

3,a. y2-y1/x2-x1
-7-8/4-(-6)
-7-8/4+6
-15/10
-3/2
b. tegak lurus
-3/2 × m2 = -1
m2= -1 : -3/2
m2= -1/1 : -3/2
m2 = -1/1 × -2/3
m2 = 2/3

5,a. y2-y1/x2-x1
3-(-3)/5-(-4)
3+3/5+4
6/10
3/5

m1×m2=-1
3/5×m2=-1
m2 = -1:3/5
m2=-1/1:3/5
m2=-1/1×5/3
m2=-5/3
gradien AB= -5/3