Name the constant of variations for each equation
Y = 1/2x

At least two people have the same birthday in a school of 150 students

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Graph the equation. select integers for x