Question

Determine a funçao f(X)=ax+b, sabendo que f(-2) =11 e f(3) =-9
Ajuda plz

Answer 1

ax + b = y
-2a+b = 11.(-1)
3a + b = -9
--------------------
2a - b = -11
3a + b = -9
-----------------
5a = -20
a = -20/5
a = -4

3a+b = -9
3.(-4)+b = -9
-12+b = -9
b = -9 + 12
b = 3

f(x) = -4x+3

Answer 2

-2a+b=11
3a+b=-9 (x-1)
....
-2a+b=11
-3a-b=9
-5a=20
a=-4

-2.-4+b=11
8+b=11
b=3
F(x)= -4x+3
verificando...
-2.-4+3=8+3=11