Question

There is an inverse relationship between x and y. If y is twenty when x is 2, what is x when y is 8?

5

8

40

80

Answer 1

\[y = k/x\]

\[20 = k /2\]
\[40 = k\]

therefore
\[y = 40/x\]

\[8 = 40/x\]
\[x = 40/8\]
\[x = 5\]

Answer 2

@alexandercpark ty