Mike and joe are both are both plumber mike charges an initial fee of $100 plus an hour fee of $ 60. joe charges $50 plus an hourly fee. of $75 if mike and joe each have 3 hour job who earn more money ? and how much more?

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?