Suppose you are saving money to buy a digital video camera that costs $349. You have already saved $120 and plan to save $20 each week. How many weeks will you need to save before you can buy the camera?

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?