In Question 1, what do you notice about the x-coordinates before and after a horizontal stretch? What do you notice about the y-coordinates before and after a vertical stretch? Express your answer in terms of nx and ny

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?