diketahui fungsi f(x) = ax + b. jika f(2) = -2 dan f(3) = 13, tentukan nilai f(4)

f(2)--> 2. a+b=-2
f(3) --> 3. a+b=13

1. 2.a+b= -2
2.3.a+b= 13
_________ -
-1a. = -15
a. = -15: -1a
a. = 15.
b= 3.a+b=13
3.15+b=13
b = 13-3×15
b= 13- 45
b= -32
nilai f(4)=ax+b
=13.4+-32
=52+(-32)
=20
jadikan yang terbainly SALAM RMY