A particle is moving with the given data. Find the position of the particle, s(t). a(t) = 42 – 7t + 5, s(0) = 0, s(1) = 20

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?