Need help on both of these please I am really stressed out

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?

Someone me what is the area of this figure? 18m 18m 8m 16m

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm