## mamma17 2 years ago 1. Suppose that x and y vary inversely, and x = 7 when y = 11. Write the function that models the inverse variation. a.) y=1.57x b.) y=77/x c.) y=4/x d.) y=18/x

1. KingGeorge

Since they are inversely proportional, you know that$y=\frac{k}{x}$for some real number k. You also know that when x=7, y=11. So you have $11=\frac{k}{7}.$So you just need to solve for $$k$$. That make sense?

2. mamma17

so then I would times 7 on each side to get the answer?

3. KingGeorge

Exactly.

4. mamma17

ty lol so then the answer would be y=77/x?

5. KingGeorge

Looks right to me.

6. mamma17

ty ty ty

7. KingGeorge

You're welcome.