tolooong bangeet pliiiiz

f(x) = ax + b
f(3)= 3a + b = -4......... (x2)
f(-2)= -2a + b = 11....... (x3)

6a + 2b = -8
-6a + 3b = 33
--------------------- +
5b = 25
b = 25/5
b = 5

3a + b = -4
3a + 5 = -4
3a = -9
a = -3

f(-4) =ax + b
f(-4) = -3.-4 + 5
f(-4) = 12+5
f(-4) = 17