tolong :( diketahui f(x)=ax+b jika f(2)=13 dan f(5)=22 maka nilai f(-2) adalah A.-1 B.1 C.3 D.9 TOLONG

f(2) = 13
13 = 2a + b
f(5) = 22
22 = 5a + b

5a + b = 22
2a + b = 13
3a = 9
a=3,b=7
f(x) = 3x+7
f(-2) = 3(-2) + 7
f(-2) = -6 + 7
f(-2) = 1 (B)
semoga membantu:)