Question

Which of the following exponential functions goes through the points (1, 6) and (2, 12)?

3(2)^x
2(3)^x
3(2)^-x
2(3)^-x

Answer 1

@jango_IN_DTOWN

Answer 2

do you have a graphing calculator?

Answer 3

ok wait.. lets do it in four parts

Answer 4

1st case Let y=3.2^x when x=1, y= 3.2^1=3.2=6 so (1,6) is a point on it
when x=2, y=3.2^2=3.4=12
so(2,12) is a point on it
so 3.2^x contains the points (1,6) and (2,12)

Answer 5

So A

Answer 6

there may be more than 1 possibilities right? so we have to check for all of them

Answer 7

now for the 2nd case y=2.3^x put x=1 and you have y=6
put x=2 and you have y=18 so (2,12) doesnot lie on it. so 2nd case is not possible

Answer 8

3rd and 4th case will also be not true.. so only 1st case is true

Answer 9

Thank you so much

Answer 10

hey could u check this

Answer 11

Two different plants grow each year at different rates, which are represented by the functions f(x) = 4x and g(x) = 5x + 2. What is the first year the f(x) height is greater than the g(x) height?

Answer 12

the choices are
year 0
year 1
year 2
year 3

Answer 13

i got year 1

Answer 14

is that right

Answer 15

may be you wrote f(x) or g(x) wrong

Answer 16

5x>4x so 5x+2>4x.. g(x)>f(x) alwaysssssssss

Answer 17

@dancergirl45

Answer 18

yes

Answer 19

check the functions. they are not correct

Answer 20

i copied and pasted it

Answer 21

question is wrong and i justified you the reason. it is never possible that f(x)>g(x)

Answer 22

oh ok