Determine for which polynomial(s) (x + 2) is a factor. P(x)=x^(4)-3x^(3)-16x-12 Q(x)=x^(3)-3x^(2)-16x-12

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?