Inverse functions Problem set A Answers

1. (a) (4.48, 1.5)
2. (b) y = x

(3, 1), (5, 2), (9, 4), (13, 6)

1. (a) 8
2. (b) 4
3. (c) (8, 3)

1. (a) (3.16, 0.5)
2. (b) 0.500. The point \((3.16, 0.5)\) lies on \(y=\log_{10}x\), as the reflection should.

1. (a) 38
2. (b) 4. Four tickets cost £50.
3. (c) (62, 5)

1. (a) (31, 50)
2. (b) 31 miles is 50 km. \(f^{-1}\) turns miles into kilometres.

1. (a) (4, 4)
2. (b) (4, 4). A point on the mirror line is its own reflection.