Question

construir a tabela e esboçar o grafico das funçoes do 1°grau definida por: f(x)2x-1

Answer 1

f(x)=y
normalmente atribuímos a x os valores -2, -1, 0, 1, 2
x                     y                        (x,y)
x= -2         -4  - 1  =  -5          -2   -5
-1               ( 2*-1) -1 = -3       -1   -3
0                  0 - 1                    0    -1
1                  2-1                      1     1
2                  4-1                      2     3