fungsi f dirumuskan f(x)=-2x+b, jika f (9) =-7. berapa nilai b?

=> -2(9) +b = -7
=> -18 + b = -7
=> b =-7+18=11

jadi, B=11

f (x) = -2x + b
f (9) = -7
-2.9 + b = -7
-18 + b = -7
b = -7 + 18
b = 11
Maaf kalo salah ;)