Write a direct proportion equation
that shows the price (y) for any
number of posters (x) that are $2.50
each.
A. y = kx
B. 2.50x = y
C. $2.50 = yx
D. 2.50y = x
The direct portion equation is B; the variable letter used for the number of posters are x which will cost $2.50 for the fixed amount a person may purchase and it will equal y as it is the letter used to represent the total price
