Alex has saved $3. he doubles the amount he saves each week. does this represent an exponential function? if so why and if not why ? bexplain

This represent an exponential function, because his savings increase by a constant factor of 2.

It is given that,

Luis has saved $3 and he doubles the amount each week.

So, the amount saved in the next week = 3×2 = 6

This gives the amount saved in the third week = 6×2 = 12

So, we get the sequence 3,6,12...

It can be written as, 3×2⁰, 3×2¹, 3×2², 3×2³,.....

So, the sequence in the exponential form , where 'n' is a natural number.

Also, 3,6,12...

The numbers are increasing by the factor =

Hence, we get,

This represent an exponential function, because his savings increase by a constant factor of 2.

-2 is the right

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )