ditentukan f(x)=8-2×dengam daerah asal (-3,-2,-1,0,1,2,3,)daerah hasil fungsi tersebut adalah

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = 8 - 2x

f(-3) = 8 - 2 . (-3)
       = 14

f(-2) = 8 - 2 . (-2)
       = 12

f(-1) = 8 - 2 . (-1)
        = 10

f(0) = 8 - 2 . 0
       = 8

f(1) = 8 - 2 . 1
      = 6

f(2) = 8 - 2 . 2
      = 4

f(3) = 8 - 2 . 3
      = 2

Daerah hasil = { 14, 12, 10, 8, 6, 4, 2 }

f(x)= 8-2X
x= -3, -2, -1, 0, 1, 2, 3 
f(-3)= 8-2.-3= 14
f(-2)= 8-2.-2= 12
f(-1)= 8-2.-1= 10
f(0) = 8-2.0 = 8
f(1) = 8-2.1= 6
f(2) = 8-2.2 = 4
f(3) = 8-2.3 = 2