Question

faça a associação correta de cada reta à lei da função afim correspondente:

r: y=(x-1)/2
s: y=(-3x/2) - 3
t: y= -x+5
u: y=(3x/4)-3

Answer 1

a) A(0,5) B(5,0)

$m=\dfrac{0-5}{5-0}=\dfrac{-5}{5}=-1$

$y=y_{0}+m(x-x_{0})$

$\mathsf{y=5-x}$ →reta t

b)

M(-2,0) N(0,-3)

$m=\dfrac{-3}{2}=-\dfrac{3}{2}$

$y=-3-\dfrac{3}{2}(x-0)\\y=-3-\dfrac{3x}{2}$

→reta s

c)

P(1,0) Q(0,-½)

$m=\dfrac{-\dfrac{1}{2}}{-1}=\dfrac{1}{2}$

$y=0+\dfrac{1}{2}(x-1)=\dfrac{x-1}{2}$→reta r

d) a reta u corresponde ao gráfico da letra d