The first year of charity walk event had an attendance of 500. The attendance y increase by 5% each year. Write an exponential growth function to represent this situation. How many people will attend in the 10th year? Round your answer to the nearest person.

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Answer:

Step-by-step explanation:

An exponential function has a standard form of

[tex]y=a(b)^x[/tex] where a is the initial value and b is the growth/decay rate in decimal form.

If the walk had an attendance of 500 the first year, that means that for us,

a = 500

If the attendance is expected to increase by 5% each year, then not only does b retain its initial attendance, it is added to by 5%: 100% + 5% = 105% or, in decimal form, 1.05

Our function, then, is

[tex]y=500(1.05)^x[/tex] and we need to solve for the number of people, y, that will attend in year x = 10:

[tex]y=500(1.05)^{10}[/tex]

First raise 1.05 to the 10th power to get

y = 500(1.628894627) and then multiply those 2 numbers together to get

y = 814.4 or 814 people in the 10th year

In the 10th year, there were 776 people in attendance.

An exponential growth function is given by:

y = abˣ

where y,x are variables, a is the initial value of y and b is the multiplier.

Given that the first year had an attendance of 500, hence a = 500. Also, there is an increase of 5% each year, hence b = 5% + 100% = 1.05

Therefore the exponential function is given by:

[tex]y = 500(1.05)^{x-1}\\\\In\ the\ 10th\ year:\\y = 500(1.05)^{10-1}=776[/tex]

Hence in the 10th year, there were 776 people in attendance.

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