Sorry if im asking for to much.but i need help again!!!

The distributive property allows you to say that 3(x − 1) = 3x −

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?

A50% increase followed by 33 1/2% decrease