Which could be the area of the base of the triangular prism?
5 ft.
3 ft
5 ft
4 ft
[Not drawn to scale)
6 ft?
10 ft?
12 ft2
20 Ft
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An equation where variables are used to represent known values—function notation true or false

What is the missing step in this proof ?

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?