Question

i need help

Answer 1

wth wat

Answer 2

one minute plzz

Answer 3

The way teacher marked, s/he doesn't look pleased... lol...

Answer 4

i marked all of that i am home schooled

Answer 5

so f(x) is same as y, just another way to say f(x)

if y varies directly with x, that means \(y = kx\), where k is some constants

So we were given that y = -2 when x = 8, we need to find k.

Answer 6

oh... well sorry then lol...

Answer 7

ok i dived right?

Answer 8

well, yeah. divide x.

Answer 9

so you get \(\dfrac{y}{x} = k\)

Answer 10

-2/8=-0.25

Answer 11

yep, so k = -0.25

Answer 12

so for b how do i work it

Answer 13

now we know k, just write equation

Answer 14

wait

Answer 15

y = kx

Answer 16

-2=-0.25*8

Answer 17

no, not that, just equation but this time, we now know what k is

Answer 18

ok so y=kx

Answer 19

yeah, but what is k?

Answer 20

-0.25

Answer 21

yep, so y = ...?

Answer 22

y=-0.25x

Answer 23

yep, that it

Answer 24

so for c
how do i do that

Answer 25

now we have equation y=-0.25x.

since in part c, we were given that x = -4
now plug in that value in equation, then solve for y ( aka f(x) ).

Answer 26

y=-0.25*-4 y=1

Answer 27

yep

Answer 28

1 is answer

Answer 29

d= -16?

Answer 30

yay thanks

Answer 31

no problem!