Direct Variation
[tex]\begin{gathered} y\alpha x \\ y=kx \end{gathered}[/tex]
k is called the constant of proportionality
Let us plug in the initial conditions given so that we will be able to obtain a value for k
[tex]\begin{gathered} y=kx \\ 0.5=k\times1 \\ k=0.5 \end{gathered}[/tex]
Then we have
[tex]y=0.5x[/tex]
