Question

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

Answer 1

Solution

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

$\begin{gathered} 5=3k \\ divide\text{ both sides both sides} \\ \frac{5}{3}=\frac{3k}{3} \\ \\ k=\frac{5}{3} \\ \\ k=1.6667 \\ \end{gathered}$

The constant proportionality is

$1.6667$