Question

Tolong dijawab dong.... Hari ini mau dikumpul
Pake Cara!!!

Answer 1

F(x) = ax+b

f(3) = 3a+b
13  = 3a+b → i

f(-1) = -1a+b
1     = -1a+b → ii

eliminasi i & ii
3a+b = 13
-1a+b = 1
----------------- -
4a = 12
a = 12/4
a = 3

3a+b = 13
3(3)+b = 13
b = 13 - 9
b = 4