Sabemos que os pontos (-2, 6) e (4, 0) pertencem ao gráfico de uma função afim, dada por f(x) = ax + b, com a e b constantes reais. É correto afirmar que: (A) a + b = 5. (B) f(x) é uma função decrescente. (C) f(x) é uma função crescente. (D) f(-1) = 3.

5

step-by-step explanation:

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.