Fungsi f dirumuskan f(×)=p×+q.jika f(3)=9 dan f(-6)=3,maka rumus funsi f(×) adalah tolong jawab pake caranya iyaa

f(x) = px + q

f(3) = 9
3p + q = 9

f(-6) = 3
-6p + q = 3

eliminasi
3p + q = 9
-6p + q = 3
__________ -
9p = 6
p = 6/9
p = 2/3

3p + q = 9
3(2/3) + q = 9
2 + q = 9
q = 9 - 2
q = 7

Rumus fungsi = 2/3x + 7

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = px + q

f(3) = 3p + q = 9
f(-6) = -6p + q = 3
........--------------------- -
9p = 6
p = 6/9
p = 2/3

3p + q = 9
3 . 2/3 + q = 9
2 + q = 9
q = 9 - 2
q = 7

f(x) = (2/3) x + 7