Question

Harry buys 3 granola bars for $5. Sidnee buys 9 granola bars for $15.What is the constant proportionality?

Answer 1

Harry buys 3 granola bars for $5. Sidnee buys 9 granola bars for $15.

`\begin{gathered} y=kx \\ \end{gathered}`

Where

x=3

y=5

k is the proportionality

`\begin{gathered} 5=3k \\ divide\text{ both sides both sides} \\ (5)/(3)=(3k)/(3) \\ \\ k=(5)/(3) \\ \\ k=1.6667 \\ \end{gathered}`

The constant proportionality is

`1.6667`