Math !

1. what function equation is represented by this graph?

a. f(x)=20(25)x

b. f(x)=20(35)x

c. f(x)=20(52)x

d. f(x)=20(53)x

2. what function equation is represented by this graph?

a. f(x)=40(1.5)x

b. f(x)=40(2.5)x

c. f(x)=40(2.25)x

d. f(x)=40(3.25)x

3.
the population of a city is 35,400. the population is expected to grow at a rate of 2% each year.

what function equation represents the population of the city after t years?

a. f(t)=35,400(0.02)t

b. f(t)=35,400(2)t

c. f(t)=35,400(1.2)t

d. f(t)=35,400(1.02)t

4. the ordered pairs model an exponential function, where p is the function name and t is the input variable.

{(12160)}{(1, 80), (2, 240), (3, 720), (4, 2160)}

what is the function equation in sequence notation?