Let:
[tex]\begin{gathered} (x1,y1)=(3,90) \\ (x2,y2)=(1,y) \end{gathered}[/tex]
let:
[tex]y1=kx1[/tex]
where:
k = constant of proportionality:
[tex]\begin{gathered} 90=3k \\ k=\frac{90}{3} \\ k=30 \end{gathered}[/tex]
so:
[tex]\begin{gathered} y=30x \\ x=1 \\ y=30 \\ ---- \\ x=9 \\ y=270 \\ ---- \\ x=14 \\ y=420 \end{gathered}[/tex]
Answer:
From left to right:
30, 270, 420
