Question

MATH HELP!!!!!

If y = 15 when x = 2, what is the value of x when y = 7?

Answer 1

Direct Variation:
`(y)/(x) = k`

`(15)/(2) = k`

when y = 7:
`(7)/(x) = (15)/(2)`

14 = 15x

`(14)/(15) = x`

Inverse variation: y*x = k

15 * 2 = k

30 = k

when y = 7: 7 * x = 30

`x = (30)/(7)`