Which equation represents a linear function? Select all that apply. A)
2y(3−x)=6

B)
2y=(3−x)+6

C)
−2y2=x2+6

D)
25y+(−12)x=1

E)
d5+9=d(11d)

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?