17. Will buys an iPhone for $400. After 5 years the value of the iPhone is expected to be $150. Will decides to create a linear model to assess the value of the iPhone at the given time. For his linear model, he uses V to
represent the value of the iPhone, and t to represent time in years.
a. What are the independent and dependent variables
b. Write a linear equation for V and. t

How do i do this? i don’t understand

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Which of the following is the graph of y= square root -x-3