Question

The Unruly Queens chess club is hosting a tournament, and each club member is bringing something to eat or drink. Nicole decides to bring oatmeal raisin cookies from her favorite bakery.

There is a proportional relationship between the number of oatmeal raisin cookies Nicole buys, x, and their total cost (in dollars), y.

x (cookies) y (dollars)

10 $ 10

12 $ 12

14 $ 14

20 $ 20

Write an equation for the relationship between x and y.

y=?

Answer 1

The equation for the relationship between the number of oatmeal raisin cookies Nicole buys and their total cost is y = $1/2x + 5.

Step-by-step explanation:

The given information shows a proportional relationship between the number of oatmeal raisin cookies Nicole buys (x) and their total cost (y) in dollars.

To write an equation for this relationship, we can observe that the cost increases by $1 for every 2 extra cookies purchased.

Therefore, the equation can be written as y = $1/2x + 5.