Christopher has $900 in an account. He decides to take out $25 each month for savings. Model the information for how much money is left in the account. What type of model is this? *
Arithmetic
Geometric

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?