sales tax question (too long)

Question

the sales tax collected on each sale varies directly as the amount of the sale. What is the constant of varation if a sale tax of $0.63 is collected on a sale of $9.00?

 

how would u solve this 

Answer 1

Hello, thank you for taking the time to post your question!

To find the constant of variation in this case you just want to divide

k = sales tax / amount of sale

for this set of information that becomes

k = 0.63/9.00 = 0.07

meaning the constant of variation here is 0.07, or the 7% sales tax rate

I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)

Answer 2

Hi Fanny;

0.63/9.00=0.07=7%