Question

Qual das funções a seguir representa o gráfico abaixo:

A) f( x ) = 200.x - 1000

B) f( x ) = - 200.x - 1000

C) f( x ) = 20.x + 1000

D) f( x ) = 30.x + 20

E) f( x ) = x + 1

Answer 1

$\large\boxed{\begin{array}{l}\rm o\,gr\acute afico\,passa\,pelos\,pontos\,A(0,-1000)~e~B(5,0)\\\rm m=\dfrac{y_B-y_A}{x_B-x_A}\\\\\rm m=\dfrac{0-(-1000)}{5-0}\\\\\rm m=\dfrac{1000}{5}\\\\\rm m=200\\\rm y=y_0+m(x-x_0)\\\rm y=0+200(x-5)\\\rm y=200x-1000\\\rm f(x)=200x-1000\\\huge\boxed{\boxed{\boxed{\boxed{\sf\red{\maltese}~\blue{alternativa~A} }}}} \end{array}}$