Question

Can you please help me with this question?
Select all of the equations that will produce exponential decay.

y = (0.1)^x
y = 2(1/4)^x
y = (3)^x
y = 1/2(5)^x
y = (2)^x
y = 3(0.4)^x

Answer 1

what do u think it is

Answer 2

for decay, y will decrease in value while x increases.

Answer 3

I think it would be
y = (0.1)^x
y = 1/2(5)^x
y = 3(0.4)^x

Answer 4

thats wht i was thinking

Answer 5

the number in the parentheses must be between 0 and 1 for it to be a decay

Answer 6

so y = 1/2 (5)^x is not decay

Answer 7

so it would be
y = (0.1)^x
y = 3(0.4)^x

Answer 8

theres another one you missed

Answer 9

and y=(2)^x

Answer 10

no :- 2 is not between 0 and 1

Answer 11

2^x gives growth

2^1 - = 2
2^2 = 4 etc

Answer 12

there is one which has a fraction in the parentheses

Answer 13

y=2(1/4)^x

Answer 14

right
plug some values of x in and you'll see when x gets bigger y will get smaller

Answer 15

thank you so much!!!

Answer 16

yw