f(x) =ax+b f(2)=-1 f(-1)=5 a.rumus fungsi f(x)= b. f(-4)=

f(x)=ax+b. eliminasi b
l.f(2)=a•2+b......... 2a+b=-1
ll.f(-1)=a•-1+b........ -1a+b=5
________-
3a = -6
a=-2
~masukan ke l
f(2)=a•2+b=-1
=-2•2+b=-1
=b=-1+4=3
a.Rumus fungsi = F(x)=-2x+3
b.f(x)=-2x+3
f(-4)=-2•-4+3
=8+3=11