Question

Answer 1

\(a,x=-1\Rightarrow y=-3x+2=-3.\left(-1\right)+2=5\\ x=\dfrac{1}{3}\Rightarrow y=-3x+2=-3.\dfrac{1}{3}+2=1\\ x=0\Rightarrow y=-3x+2=-3.0+2=2\\ b,y=\dfrac{1}{2}\Leftrightarrow-3x+2=\dfrac{1}{2}\\ \Rightarrow x=\dfrac{\dfrac{1}{2}-2}{-3}=\dfrac{-\dfrac{3}{2}}{-3}=\dfrac{1}{2}\)

Answer 2

a) x = -1 ⇒ y = -3.(-1) + 2 = 5

x = 1/3 ⇒ y = -3 . 1/3 + 2 = 1

x = 0 ⇒ y = -3.0 + 2 = 2

b) y = 1/2

⇒ -3x + 2 = 1/2

-3x = 1/2 - 2

-3x = -3/2

x = -3/2 : (-3)

x = 1/2