What equation shows a proportional relationship between x and y

What is the percentage discount on a box of chocolate tea pots that is marked down from $350 to $280?

You have $100 in the class account. You want to buy so much candy that everyone is sick. There are 24 students in the class and all the candy will cost $220. How much does each student need to contribute?

20% of the students are in grade 6. There are 55 students in grade 6, how many students are there at the school?

A laptop costs $450. Dave got a 15% discount, Chris paid $400. Who got the best deal and by how much?

Solve the proportion: 95/x=38/4

What should you do if you dont know what accuracy to give your answer to?

A map has a scale of 10km=2.5cm, if you have walked 15km how many cm have you moved on the map?

You go to a shop and buy pens and pencils. The pens cost $0.5 each and the pencils cost $0.35 each. You have $12 but want to have $2 left over. If you buy six pens how many pencils can you buy?

What is the constant of proportionality ?

Find the average of these numbers 1,6,7,9,9,16

Is a rational number always an integer?