Question

JHGJHGMNH NH H

Answer 1

i think it's D b.c range is y and 9 is Y and it's a positive 9 so it should be 9 in more?
someone should check me.. please

Answer 2

@jim_thompson5910

Answer 3

@freckles

Answer 4

f(time)=a function of (number of video games)

anyways the input time represents the domain
and f(time) aka number of video games represents the range
you said the domain was non-negative values
values like 0,1,2,3,4,... and so on...
but if f(x) = 6x + 9
then f(0)=6(0)+9=9
and f(1)=6+9=15
and so on...
so yes the outputs are 9 or more

Answer 5

yaaaaaaaaay ! thank you :)

Answer 6

and also non-negative values can include decimal numbers
but f(0)=9
and f(1/2)=6(1/2)+9=3+9=12
and f(1)=15
so anyways just trying to show it the number values are increasing starting at 9

Answer 7

replace f(x) with 3
and solve for x

Answer 8

\[f(x)=\frac{4x+1}{3} \\ f^{-1}(3)=x \text{ implies } f(x)=3 \\ \text{ so replace } f(x) \text{ with } 3 \\ 3=\frac{4x+1}{3} \\ \text{ Solve for } x \]

Answer 9

is it 2

Answer 10

yes
3(3)=4x+1
9=4x+1
8=4x
x=2
so f(2)=3 which means
\[f^{-1}(3)=2\]

Answer 11

alright the first question was wrong. i got a 77% on this test which is better the an D or F but thank you

Answer 12

you are saying the question you asked before the inverse question"?

Answer 13

all the options had time being non-negative
f(x)=6x+9
would definitely have range y greater than or equal to 9

Answer 14

i guess C was it then

Answer 15

but its ok... i passed

Answer 16

yep for domain x greater than or equal to 0
we definitely have range is y greater than or equal to 9

that is a visual way to look at it


a algebraic way is to do the following:
we are given:
\[x \ge 0 \\ \text{ multiply both sides by } 6 \\ 6x \ge 0 \\ \text{ add both sides by } 9 \\ 6x+9 \ge 9 \\ f(x)=6x+9 \\ \text{ so } f(x) \ge 9 \]