4.2 In 1 ABD. BA is produced to F. AC is drawn with C on BD such that A = A: = x. CEDA with E on AB.
F
IST
A
Area
D
E
С C
B
(3)
4.2.1 Give, with reasons, two more angles equal to x.
BD BA
4.2.2 Prove that
DC AC
(13)​

Which function has an inverse that is also a function? a.{(-4,3), (-2, 7), (-1,0), (4, -3), (11, -7)} b.{(-4, 6), (-2, 2), (-1, 6), (4,2), (11, 2)} c.{(-4,5), (-2, 9), (-1,8), (4, 8), (11,4)} d.{(-4,4), (-2, -1), (-1,0), (4, 1), (11, 1)}