Question

If y varies directly as​ x, and y=12 when x=4​, find y when x=9.

Answer 1

Direct variation, do you know the formula?

Answer 2

y=kx

Answer 3

I am getting the wrong answer and only have one try left for this online course. could you help?

Answer 4

Substitute the given values.

Answer 5

Start by solving for k

k = y/x = 12/4 = ?

Answer 6

i got 3=k and 3=x. says x is wrong

Answer 7

One step at a time.

k = 3.

substitute this back in to your formula.

y =3x

Now when x = 9 what would y =?

y = 3 * 9 = ?

Answer 8

oh okay. i divided

Answer 9

mmhmm.

Answer 10

thx