Step-by-step explanation:
7. m1.m2 = -1
-1/5.m2 = -1
m2 = 5
formula = y - y1 = m2 ( x - x1)
y - (-2) = 5(x -(-2))
y + 2 = 5x +10
y = 5x+8
8. m1.m2= -1
2.m2= -1
m2= -1/2
formula = y - y1 = m2 ( x - x1)
y - (-1) = -1/2 (x -4)
y + 1 = -1x/2 + 2
y = -1x/2+1
