State which of the following set are equal 1) N = {1,2,3,4}
2) W = { 0,1,2,3}
3) A = {x|x = 2n, n€N
4) B = W-{0}​

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?