The variables x and y vary inversely with a constant of variation of 7. Use the inverse variation formula, k = xy, to find y when x = 9.
Given that x and y vary inversely with a constant of variation of 7, we can use the inverse variation formula:
k = xy
Since the constant of variation is 7, we have:
7 = 9y
Now, solve for y:
y = 7/9
Therefore, when x = 9, y = 7/9.