Dan is cutting 4.75 foot lengths of twine from a 240 foot spook of twine. he needs to cut 42 lengths, and says that 40.5 feet of twine will remain. show that this is reasonable

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?