Question

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

Answer 1

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?

Answer 2

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

Answer 3

Exactly.

Answer 4

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

Answer 5

Looks right to me.

Answer 6

ty ty ty

Answer 7

You're welcome.