Adrianna bought 4 spiral notebooks that cost $2.49 each. She also bought 2 boxes of markers
for $2.29 each. If she paid with a $20 bill, how much

change did she receive?

Exponential function:

Linear function:

Step-by-step explanation:

Given that:

Number of clicks by the end of 2nd day = 4

Number of clicks by the end of 4th day = 16

To find:

The function f(d) to model number of clicks in exponential and linear form.

Solution:

Given that with a value d = 2, f(d) = 4 and

d = 4, f(d) = 16

4 is

and 16 is

We can see that 2 has a power 'Number of days'.

So, exponential function can be written as:

As per the pattern given, at the end of 2nd day, there are 4 clicks

by the end of 3rd day there will be 8 clicks and

by the end 4th day it has 16 clicks.

It means that by the end of present day the number of clicks have doubled than that of clicks by end of previous day.

So, we can write the function

So, the answer is:

Exponential function:

Linear function: