Question

Determine a função de 1 grau
sabendo que F(-2)=7 e F(0) = 3?​

Answer 1

o gráfico passa pelos pontos A(-2,7) e B(0,3)

• $\begin{vmatrix}\tt{-2}&\tt{0}&\tt{1}\\\tt{7}&\tt{3}&\tt{1}\\\tt{x}&\tt{y}&\tt{1}\end{vmatrix}=0\\\sf{-2(3-y)-7(0-x)+1(0-3x)=0}\\\sf{-6+2y+7x-3x=0}\\\sf{4x+2y-6=0\div2}\\\sf{2x+y-3=0}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{y=3-2x}}}}}$