In one section of the Reptile Reserve, workers are building a lizard exhibit. Within the exhibit, there will be a triangular enclosure. The diagram shows the length of two sides of the enclosure's base. The third side extends from point A to B. Input the length of the third side. Then click done.

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?