Question

here it is number 4

Answer 1

1 sec

Answer 2

Okay

Answer 3

So you need help coming up with what exactly???

Answer 4

Will can help

Answer 5

lol

Answer 6

Lol I give up I haven't gotten to that do u do flvs online???

Answer 7

so lots of people didnt understand how to do this only Irish but he proposed something i've never seen before nor heard of

Answer 8

For part A :
This situation can be represented as exponential function because we have a constant decreasing rate and a principal to start with.

Answer 9

Dude. I'll help u with the 1st only

Answer 10

okay

Answer 11

Wouldn't a be exponential

Answer 12

Because it shows that is decreasing

Answer 13

And wouldn't two be

Answer 14

its $110 increase every year

Answer 15

I think its linear

Answer 16

Part B:
The formal shape of the exponential function is
F(x) = P(1 + r)^x
Where P is the principal which is 1200
And r is the rate of decay which is 2.5%
Based on that adjust the rate of change
100 - 2.5 = 97.5%
Therefore
R = 0.975

Now substitute
F(x) = 1200(1 - 0.975)^x

Answer 17

What u guys talking about?

Answer 18

well part is lineaer isnt it

Answer 19

how is it exponential ??

Answer 20

its increasing

Answer 21

Linear function requires a slope. A slope can be derived when the function contains constant change in this case. The change isn't constant. Check the graph of the function I just derived

Answer 22

Although it isn't increasing. It is decreasing by rate if 2.5%

Answer 23

Make sense?

Answer 24

ooohh i remember it has to have a constant to have slope yes yes of course sorry!!!

Answer 25

my teacher did talk about this

Answer 26

and whats the other possibility when its doesnt have a constant rate of change ?

Answer 27

There are different types of functions. But in your current case and math methodologies (Algebra 1 A) you'll be working with Linear and exponential function.. So if it's not linear it'll be exponential

Answer 28

okay thanks

Answer 29

Do you need part C or you got it?

Answer 30

i use the function you gave in party B and substitute "x" with 20 yes?

Answer 31

part *

Answer 32

Part C is quite different than B.. Part C is linear function.

Linear function form
F(x) = mx + b
Where m is slope and B is Y intercept.
Since they said "decrease by 3 lumens per (unit)"
Means the rate of change aka slope is constant since the rate is per unit.
Therefore the slope is -3
(because it decrease) and the y intercept is 1200 because that's the kick off number.

Thus the function would be linear indeed for part C
F(x) = -3x + 1200

Answer 33

okay thanks im alaways wrong xD gtg now cyq

Answer 34

Good luck

Answer 35

is there anything i will need to do to finish ?

Answer 36

part A right?

Answer 37

For the 1st question u posted I answered all parts

Answer 38

@jim_thompson5910 in part B why did he subtract 100 from 2.5% ?

Answer 39

Because it's similar to the other idea of having it in the form 1+r

r is a negative value, in this case r = -2.5% = -0.025

1+r = 1+(-0.025) = 1-0.025 = 0.975

so if you want to decrease a quantity by 2.5%, you multiply that value by 0.975

Answer 40

oh i get

Answer 41

so what if the decreasing value per usit was lets say 25.5%

Answer 42

then r = -25.5% = -0.255

Answer 43

yes correct