Question

write a appropriate direct variation equation if y=27 when x=9

Answer 1

The form is y=kx k is the constant of the direct variation.

so, to find k, plug in numbers (and this is what the equation would be) 27=9k
so we know that k=1/3

Answer 2

thank you...

Answer 3

You welcome, use this site it's good!

Answer 4

Can you help me with this problem? Write an appropriate inverse variation equation if y-2 when x=9

Answer 5

y=2? not y-2, correct?

Answer 6

correct

Answer 7

inverse variation form is y=k / x
so if x=9 and y=2, then

2=k/9 the reason that y=k/x is called an inverse variation, is because the bigger the y the smaller the x, and vica versa.

in your problem, note that the k=18 (as 9 times 2)

Answer 8

Thank you...

Answer 9

You welcome! \[\huge\color{blue}{ ✓ }\]