Dorothy has a ribbon that is 3 ft long and a ribbon that is 8 ft long she needs to cut the ribbon into pieces that are 1/4 foot long how many pieces will she have in all

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?