Question

.
in Grade (4th 9 weeks Spring 2020)
Using a Verbal Description to Find the Constant of Proportionality
Discount Comics is running a special: 20 comics for $5.00. Seth purchases 30 comics for $7.50. What is the sale
price per comic?
per comic?
What is the constant of proportionality?

Answer 1

Constant of Proportionality and sale  price per comic is 0.25 each .

Step-by-step explanation:

Here we have , Discount Comics is running a special: 20 comics for $5.00. Seth purchases 30 comics for $7.50. We need to find What is the sale

price per comic . Also , What is the constant of proportionality . Let's find out:

20 comics for $5.00 , So , Sale price per comic is :

⇒ $\frac{5}{20}$

⇒ $\frac{5(5)}{20(5)}$

⇒ $\frac{25)}{100}$

⇒ $0.25$

So , the sale  price per comic is 0.25 . Now ,

Let Number of comics be x , and cost be y so ,

⇒$y=k(x)$ where k is constant of proportionality

⇒$5=k(20)$

⇒ $k=\frac{5}{20}$

⇒ $k=0.25$

Therefore , Constant of Proportionality and sale  price per comic is 0.25 each .