Question

PLS HELP DUE TOMORROW

Answer 1

As you know from your textbook, notes, and lecture, direct variation is defined as

y = kx

Where k is the constant of variation.

Your posted question informs us that when y = 9, x = -3. Use this knowledge to solve for the missing link, your constant of variation k.

9 = k (-3)

9 = -3k

k = -3

So, y = kx can be expressed as: ??

Answer 2

how do i find x

Answer 3

you have y=kx
and @stamp showed you how to find k
so replace k with what he found.
then use the value given for y to find x.

Answer 4

so what would the equation i need to find x look like

Answer 5

the equation given by both stamp and I
y=kx

Answer 6

stamp found the constant k
k will always be -3 for any point (x,y)

Answer 7

so replace k in y=kx with -3

Answer 8

then use the value given for y to find x

Answer 9

y=-3+x

Answer 10

where do you get the sum from

Answer 11

you y=kx
y=k times x
times doesn't turn into plus

Answer 12

y=-3x

Answer 13

y=-3x

Answer 14

y=-3x
+3 +3
3y=x

Answer 15

you can't undo multiplication by addition
also your objective is to find x given y=18

Answer 16

18=-3x
-3 -3
-6=x

Answer 17

bingo! :)

Answer 18

thanks can you help with another please