3). Fungsi f (x) = 3x - 3

Domain {x| -2 ≤ x < 2, x € B}

Domain {-2, -1, 0, 1}

Range;

f (-2) = 3 (-2) - 3 = -6 - 3 = -9

f (-1) = 3 (-1) - 3 = -3 - 3 = -6.

f (0) = 3 (0) - 3 = -3

f (1) = 3 (1) - 3 = 0

Maka, Range {-9, -6, -3, 0}

_________

4). f (x) = ax + b

f (-2) = -2a + b = 7 ..... pers l

f (3) = 3a + b = -3 ..... pers 2

Eleminasi pers l dan 2

f (-2) = -2a + b = 7

f (3) = 3a + b = -3

-------------------------- (-)

-5a = 10

a = -2

Subtitusi a ke pers 1

-2a + b = 7

-2 (-2) + b = 7

4 + b = 7

b = 7 - 4

b = 3

Rumus Fungsi

f (x) = ax + b

f (x) = -2x + 3