For proportionality constant problems, set up the equation as,
\(x=Ky\),
Where x and y are the two variables you are comparing and K is the proportionality constant. If we take Caramel Corn values as x and Cheddar Corn values as y, and then solve for K for each ratio lines, we will get the same answer. Let's check.
\(15=K(10)\\K=\frac{15}{10}= \frac{3}{2}\),
\(30=K(20)\\K=\frac{30}{20}= \frac{3}{2}\), and
\(45=K(30)\\K=\frac{45}{30}= \frac{3}{2}\).
Hence, the proportionality constant, in this case K, is equal to \(\frac{3}{2}\) or 1.5. First answer choice is correct.
ANSWER: 1.5
