Most cellphones depreciate (lose value) as they age. A cellphone that costs $1200 will have a value of $520 at the end of 8 years.
a. What is the rate of change of the cellphone’s value with respect to time?

b. Write a formula for its value, V, when it is t years old (for 0
≤t≤

c. Determine the cellphone’s value after 2.5 years. (2 marks)

d. When is the cellphone’s value $800? (2 marks)

what are ur choices?

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

answer: 414,377,008

step-by-step explanation:

just multiply it

60%