Let's see what we know about exponential functions already! Click on all options that you think represent an exponential relationship

Can you determine which graph below represents exponential DECAY?

What type of function is 

$$y=7\left(5\right)^x$$  ?

What is the y-intercept of this function 

$$f\left(x\right)=2\left(\frac{1}{7}\right)^x$$  ?

What type of function is  

$$f\left(x\right)=2\left(1\right)^x$$  ?

Find the growth rate "r" (as a percentage) given the function: $$f\left(x\right)=3\left(1.02\right)^x$$  

The function shows the growth of a fruit fly population. f(t) is the number of fruit flies after t days.

What is the initial population of the fruit flies?

Hannah deposits $3000 in a savings account that pays interest at an annual rate of 4%. If no other money is added or withdrawn from the account, how much will be in his account after 10 years?

JP buys a new computer for $2100. The computer's worth decreases by 50% annually. How much is it worth after 2 years?

In general, this is how I feel about what we learned today: