Answer:
[tex]k=2[/tex]
Step-by-step explanation:
The constant of proportionality is given as [tex]k=\frac{y}{x}[/tex] .
Notice that when [tex]x=2[/tex] it follows that [tex]y=4[/tex].
Substitute [tex]x=2[/tex] and [tex]y=4[/tex] into the formula for the constant:
[tex]k=\frac{4}{2}=2[/tex] .
Therefore, the constant is equal to 2.
