diketahui rumus fungsi(x) = px+q. Jika f(2)=1 dan f(5)=7, maka nilai f(4) = ..

Mapel : Matematika
Bab : Fungsi

f(x) = px + q
f(2) = 2p + q = 1
f(5) = 5p + q = 7
---------------------- -
              -3p = -6
                 p = -6/-3
                 p = 2

 2p + q = 1
2.2 + q = 1
   4 + q = 1
         q = 1 - 4
         q = -3

f(x) = px + q
f(4) = 2.4 + (-3)
      = 8 - 3
      = 5

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = px + q

f(2) = 2p + q = 1
f(5) = 5p + q = 7
.........----------------- -
................. -3p = -6
................. p = 2

2p + q = 1
2 . 2 + q = 1
q = 1 - 4
q = -3

f(x) = 2x - 3

f(4) = 2 . 4 - 3
f(4) = 8 - 3
f(4) = 5