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Question

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lena772 · Answer

@ganeshie8

ganeshie8 · Answer

proving linear is easy

ganeshie8 · Answer

uve created the table in ur previous step right ?

ganeshie8 · Answer

proving investor is linear :-
in that table, take the difference of any two consecutive years.
u wil get the difference as 50. 

that means the investor function grows at a constant rate of 50 per year.  its a straight line

ganeshie8 · Answer

A=5000+50t
               ^

you can compare it wid a straight line :  y = b + mx
where slope = m = 50

ganeshie8 · Answer

Looks great ! yes just mention about y-intercept also.

lena772 · Answer

What do I say about it

ganeshie8 · Answer

just say that, the starting Principal amount,  5000 is the y-intercept

lena772 · Answer

Ok now explaining how the others are exponential ^_^

ganeshie8 · Answer

use the same trick

ganeshie8 · Answer

compare them wid the standard exponential funciton :  $y = ab^x$

ganeshie8 · Answer

$A=5000(1+0.012)^t  $

$A=5000(1.012)^t  $

lena772 · Answer

Sorry but what do the ab stand for? I'm not good at exponential

ganeshie8 · Answer

a = y-intercept
b = fixed base
x = variable power

ganeshie8 · Answer

here also, y-intercept gives u the starting principal.

lena772 · Answer

:D thank you so much

ganeshie8 · Answer

np :)

lena772 · Answer

@ganeshie8

ganeshie8 · Answer

Looks good :)